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<SEC-DOCUMENT>0001193125-10-268884.txt : 20101124
<SEC-HEADER>0001193125-10-268884.hdr.sgml : 20101124
<ACCEPTANCE-DATETIME>20101124165635
ACCESSION NUMBER:		0001193125-10-268884
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20101124
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20101124
DATE AS OF CHANGE:		20101124

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASTEC INC
		CENTRAL INDEX KEY:			0000015615
		STANDARD INDUSTRIAL CLASSIFICATION:	WATER, SEWER, PIPELINE, COMM AND POWER LINE CONSTRUCTION [1623]
		IRS NUMBER:				650829355
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08106
		FILM NUMBER:		101215536

	BUSINESS ADDRESS:	
		STREET 1:		800 S. DOUGLAS ROAD
		STREET 2:		12TH FLOOR
		CITY:			CORAL GABLES
		STATE:			FL
		ZIP:			33134
		BUSINESS PHONE:		3055991800

	MAIL ADDRESS:	
		STREET 1:		800 S. DOUGLAS ROAD
		STREET 2:		12TH FLOOR
		CITY:			CORAL GABLES
		STATE:			FL
		ZIP:			33134

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BURNUP & SIMS INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d8k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML><HEAD>
<TITLE>Form 8-K</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE">

 <P STYLE="line-height:0px;margin-top:0px;margin-bottom:0px;border-bottom:0.5pt solid #000000">&nbsp;</P>
<P STYLE="line-height:3px;margin-top:0px;margin-bottom:2px;border-bottom:0.5pt solid #000000">&nbsp;</P> <P STYLE="margin-top:4px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>UNITED STATES </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>SECURITIES AND EXCHANGE COMMISSION </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="3"><B>Washington, D.C. 20549 </B></FONT></P> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center>
<P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center> <P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="5"><B>FORM 8-K
</B></FONT></P> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center> <P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="4"><B>CURRENT REPORT </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="3"><B>Pursuant to Section&nbsp;13 or 15(d) of The </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>Securities Exchange Act of
1934 </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="3"><B>Date of report (Date of earliest event reported): November&nbsp;24, 2010 </B></FONT></P>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center> <P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="6"><B>MASTEC, INC. </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>(Exact Name of Registrant as Specified in Its Charter) </B></FONT></P>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center> <P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:6px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Florida </B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(State or Other Jurisdiction of Incorporation) </B></FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" ALIGN="center">

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<TD WIDTH="32%"></TD></TR>
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<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Florida</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>0-08106</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>65-0829355</B></FONT></TD></TR>
<TR>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(State or other jurisdiction</B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>of incorporation)</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Commission</B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>File Number)</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" ALIGN="center"> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(IRS Employer</B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>Identification No.)</B></FONT></P></TD></TR></TABLE> <P STYLE="margin-top:12px;margin-bottom:0px;padding-bottom:0px;" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>800 S. Douglas
Road, 12<FONT STYLE="font-family:Times New Roman" SIZE="1"><SUP STYLE="vertical-align:baseline; position:relative; bottom:.8ex">th</SUP></FONT><FONT STYLE="font-family:Times New Roman" SIZE="2"> Floor, Coral Gables, Florida 33134
</FONT></B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Address of Principal Executive Offices) (Zip Code) </B></FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>(305) 599-1800 </B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="1"><B>(Registrant&#146;s Telephone Number, Including Area Code) </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>N/A
</B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1"><B>(Former Name or Former Address, if Changed Since Last Report) </B></FONT></P>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P><center> <P STYLE="line-height:6px;margin-top:0px;margin-bottom:2px;border-bottom:1pt solid #000000;width:21%">&nbsp;</P></center>
<P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under
any of the following provisions: </FONT></P> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </FONT></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) </FONT></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) </FONT></TD></TR></TABLE>
<P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><FONT STYLE="FONT-FAMILY:WINGDINGS">&#168;</FONT></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) </FONT></TD></TR></TABLE>
<P STYLE="font-size:8px;margin-top:0px;margin-bottom:0px">&nbsp;</P> <P STYLE="line-height:0px;margin-top:0px;margin-bottom:0px;border-bottom:0.5pt solid #000000">&nbsp;</P>
<P STYLE="line-height:3px;margin-top:0px;margin-bottom:2px;border-bottom:0.5pt solid #000000">&nbsp;</P>

<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="10%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>ITEM&nbsp;1.01</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Entry Into a Material Definitive Agreement. </B></FONT></TD></TR></TABLE> <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">MasTec, Inc., a Florida corporation (&#147;<U>MasTec</U>&#148;), has commenced an offer to exchange (i)&nbsp;up to $115.0 million aggregate principal amount of its 4.00% Senior Convertible Notes due 2014
(the &#147;<U>New 4.00% Notes</U>&#148;), for a like principal amount of its outstanding 4.00% Senior Convertible Notes due 2014 (the &#147;<U>Original 4.00% Notes</U>&#148;), plus an exchange fee of $2.50 per $1,000 in principal amount of Original
4.00% Notes validly tendered and accepted in the exchange offer and (ii)&nbsp;up to $100.0 million aggregate principal amount of 4.25% Senior Convertible Notes due 2014 (the &#147;<U>New 4.25% Notes</U>&#148; and together with the New 4.00% Notes,
the &#147;<U>New Notes</U>&#148;), for a like principal amount of its outstanding 4.25% Senior Convertible Notes due 2014 (the &#147;<U>Original 4.25% Notes</U>&#148; and together with the Original 4.00% Notes, the &#147;<U>Original
Notes</U>&#148;), plus an exchange fee of $2.50 per $1,000 in principal amount of Original 4.25% Notes validly tendered and accepted in the exchange offer (the foregoing offers, the &#147;<U>Exchange Offer</U>&#148;). </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The terms of the New Notes will be substantially identical to the Original Notes, except for certain features primarily related to the
conversion of the New Notes as described in the prospectus (the &#147;<U>Prospectus</U>&#148;) contained in MasTec&#146;s Registration Statement on Form S-4 as filed with the Securities and Exchange Commission (the &#147;<U>Commission</U>&#148;) on
November&nbsp;24, 2010, including a net settlement feature which provides that, upon conversion of the New Notes, MasTec will pay or deliver, as the case may be, cash, shares of MasTec&#146;s common stock or a combination thereof, and conditional
conversion features which provide that the New Notes may be converted upon certain specified conditions among other differences all as described in the Prospectus. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">In connection with the Exchange Offer, on November&nbsp;24, 2010, MasTec entered into an amendment (the &#147;<U>Letter Amendment</U>&#148;) to its Second Amended and Restated Loan and Security Agreement,
dated July&nbsp;29, 2008, as amended (the &#147;<U>Credit Facility</U>&#148;), with Bank of America, N.A., as administrative agent for the lenders thereunder, pursuant to which the lenders thereunder consented to the Exchange Offer and the issuance
of the New Notes in connection with the Exchange Offer, subject to, among other things, the condition that, prior to the expiration of the Credit Facility in May 2013, MasTec may not use more than $10.0 million in the aggregate from cash on hand to
defease, redeem or settle conversions of the New Notes, without the prior consent of the lenders under the Credit Facility. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The foregoing description of the Letter Amendment is only a summary and is qualified in its entirety by reference to the full text of the
Letter Amendment, which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated by reference herein. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">A
registration statement relating to the Exchange Offer and the New Notes has been filed with the Securities and Exchange Commission but has not yet become effective. The New Notes may not be sold nor may offers to buy be accepted prior to the time
the registration statement becomes effective. This Current Report on Form 8-K shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the New Notes in any State in which such offer, solicitation or
sale would be unlawful prior to registration or qualification under the securities laws of any such State. </FONT></P> <P STYLE="font-size:18px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="10%" VALIGN="top" ALIGN="left"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>ITEM&nbsp;9.01</B></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>Financial Statements and Exhibits. </B></FONT></TD></TR></TABLE> <P STYLE="margin-top:6px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><I></I><B><I>(d) Exhibits</I></B><I> </I></FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">10.1 &#151; Letter Amendment to Credit Facility, dated
November&nbsp;24, 2010. </FONT></P>

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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>SIGNATURES </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
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<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" COLSPAN="5"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Date:&nbsp;November 24, 2010</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ Alberto de Cardenas</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Alberto de Cardenas</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President, General Counsel and Secretary</FONT></TD></TR></TABLE>

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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">Exhibit Index </FONT></P>
<P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
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<TD VALIGN="bottom" NOWRAP ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="1">Exhibit<BR>No.</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" NOWRAP><FONT STYLE="font-family:Times New Roman" SIZE="1">Description</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">10.1</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT STYLE="font-family:Times New Roman" SIZE="2">Letter Amendment to Credit Facility, dated November 24, 2010.</FONT></TD></TR></TABLE>
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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>dex101.htm
<DESCRIPTION>LETTER AMENDMENT TO CREDIT FACILITY
<TEXT>
<HTML><HEAD>
<TITLE>Letter Amendment to Credit Facility</TITLE>
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 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT STYLE="font-family:Times New Roman" SIZE="2">Exhibit 10.1 </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="2">November&nbsp;24, 2010 </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">MasTec, Inc. and the other </FONT></P>
<P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Borrowers and Guarantors referred to below </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">800
Douglas Road, North Tower, 12th Floor </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Coral Gables, Florida 33134 </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT
STYLE="font-family:Times New Roman" SIZE="2">Attention: Chief Executive Officer </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
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<TD WIDTH="95%"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Re:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter Agreement Regarding 2010 Convertible Notes Issuance and Amendments to Loan Agreement</FONT></TD></TR></TABLE> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT
STYLE="font-family:Times New Roman" SIZE="2">Ladies and Gentlemen: </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">We refer to the Second Amended and Restated Loan and
Security Agreement dated July&nbsp;29, 2008, by and among MasTec, Inc., a Florida corporation (&#147;<U>MasTec</U>&#148;), certain of the Subsidiaries of MasTec which are identified on the signature pages hereto (together with MasTec, collectively,
&#147;<U>Borrowers</U>&#148;), the financial institutions party thereto from time to time (the &#147;<U>Lenders</U>&#148;) and Bank of America, N.A., as administrative agent for the Lenders (the &#147;<U>Agent</U>&#148;), as amended by that certain
letter amendment dated December&nbsp;16, 2008, as amended by that certain letter amendment dated June&nbsp;1, 2009, and as amended by that certain letter amendment dated November&nbsp;3, 2009 (as so amended and at any other time amended, restated,
modified or supplemented, the &#147;<U>Loan Agreement</U>&#148;). All capitalized terms used in this consent and letter amendment, unless otherwise defined herein, shall have the meanings ascribed to such terms in the Loan Agreement. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">As described in the Loan Agreement, Borrowers are currently parties to (a)&nbsp;the New Convertible Notes Indenture, pursuant to which
the New Convertible Notes were issued, and (b)&nbsp;the Precision Convertible Notes Indenture, pursuant to which the Precision Convertible Notes were issued. The New Convertible Notes and the Precision Convertible Notes are collectively referred to
herein as the &#147;<U>Existing Convertible Notes</U>&#148;, and the New Convertible Notes Indenture and the Precision Convertible Notes Indenture are collectively referred to herein as the &#147;<U>Existing Convertible Notes Indentures</U>&#148;.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Borrowers have advised the Agent and the Lenders that MasTec intends to replace some or all of the Existing Convertible Notes
by means of (a)&nbsp;a proposed issuance of new convertible notes (collectively, the &#147;<U>4.00% 2010 Convertible Notes</U>&#148;) in the original principal amount of up to $115,000,000, pursuant to a supplemental indenture (the &#147;<U>4.00%
2010 Convertible Notes Indenture</U>&#148;) among MasTec, as issuer of the 4.00% 2010 Convertible Notes, certain of MasTec&#146;s Subsidiaries, as guarantors of the 4.00% 2010 Convertible Notes, and the trustee named therein, and (b)&nbsp;a proposed
issuance of new convertible notes (collectively, the &#147;<U>4.25% 2010 Convertible Notes</U>&#148;) in the original principal amount of up to $100,000,000, pursuant to a supplemental indenture (the &#147;<U>4.25% 2010 Convertible Notes
Indenture</U>&#148;) among MasTec, as issuer of the 4.25% 2010 Convertible Notes, certain of MasTec&#146;s Subsidiaries, as guarantors of the 4.25% 2010 Convertible Notes, and the trustee named therein (such refinancing transaction, including the
issuance of the 2010 Convertible Notes, is referred to herein as the &#147;<U>Proposed 2010 Convertible Notes Issuance</U>&#148;). The 4.00% 2010 Convertible Notes and the 4.25% 2010 Convertible Notes are collectively referred to herein as the
&#147;<U>2010 Convertible Notes</U>&#148;, and the 4.00% 2010 Convertible Notes Indenture and the 4.25% 2010 Convertible Notes Indenture are collectively referred to herein as the &#147;<U>2010 Convertible Notes Indenture</U>&#148;. </FONT></P>

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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Borrowers have provided to the Agent and the Lenders a summary of the terms of the Proposed
2010 Convertible Notes Issuance, such terms being more particularly described on <U>Exhibit A</U> attached hereto. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Pursuant
to <U>Section&nbsp;10.2.3</U> of the Loan Agreement, Borrowers may not create, incur, assume, guarantee or suffer to exist any Debt, except for, among other exceptions, Refinancing Debt so long as each of the Refinancing Conditions is met. Borrowers
acknowledge that, due to the possibility of an earlier conversion which pursuant to its terms could be satisfied by paying cash, the Debt under the 2010 Convertible Notes may have a final maturity date that is earlier than the final maturity date of
the Debt under the Existing Convertible Notes. As a result, the Debt under the 2010 Convertible Notes does not satisfy clause (ii)&nbsp;of the definition of &#147;Refinancing Conditions&#148; and therefore is not permitted as Refinancing Debt
pursuant to <U>Section&nbsp;10.2.3</U> of the Loan Agreement. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">Notwithstanding the fact that the Debt under the Proposed 2010
Convertible Notes Issuance does not constitute Refinancing Debt permitted under the Loan Agreement, Borrowers have requested that the Agent and the Lenders consent to the Proposed 2010 Convertible Notes Issuance and the incurrence of Debt by
Borrowers under the 2010 Convertible Notes pursuant to the terms of the 2010 Convertible Notes Indenture. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">The Agent and the
Lenders are willing to consent to the Proposed 2010 Convertible Notes Issuance, and the incurrence of Debt by Borrowers and guaranty by certain subsidiaries of MasTec under the 2010 Convertible Notes pursuant to the terms of the 2010 Convertible
Notes Indenture, and to amend the Loan Agreement in connection therewith, in each case, on the terms and conditions set forth in this consent and letter amendment. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">NOW, THEREFORE, for the sum of TEN DOLLARS ($10.00) in hand paid and other good and valuable consideration, the receipt and sufficiency of which are hereby severally acknowledged, the parties hereto,
intending to be legally bound hereby, agree as follows: </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>1. <U>Consent to the Proposed 2010 Convertible Notes
Issuance</U>.</B> At the request of Borrowers, the Agent and the Lenders hereby consent to the Proposed 2010 Convertible Notes Issuance by MasTec and the incurrence of Debt by Borrowers under the 2010 Convertible Notes, and the guaranty by
MasTec&#146;s other Subsidiaries thereof, so long as each of the following conditions has been satisfied, each in form and substance satisfactory to the Agent, on or before January&nbsp;31, 2011: </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(a) No Default or Event of Default exists at the time of, or will exist immediately after giving effect to, the Proposed
2010 Convertible Notes Issuance; </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b) Each Borrower delivers to the Agent a duly executed counterpart of this
consent and letter amendment; </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(c) MasTec certifies to the Agent in writing that, upon consummation of the
Proposed 2010 Convertible Notes Issuance, and the exchange of certain Existing Convertible Notes thereunder, (i)&nbsp;no breach or default exists under the Existing Convertible Notes or the Existing Convertible Notes Indentures, nor will exist
thereunder after giving effect to the Proposed 2010 Convertible Notes Issuance, and (ii)&nbsp;all such Existing Convertible Notes shall be cancelled and of no further force and effect; </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(d) The Agent receives a true, correct and complete copy of the executed 2010 Convertible Notes Indenture; </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 2 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(e) MasTec certifies to the Agent in writing that the Proposed 2010
Convertible Notes Issuance, and the issuance of the 2010 Convertible Notes in connection therewith, is permitted under and do not violate the provisions of the Indenture or cause to exist a default thereunder; </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(f) The Agent receives evidence that: </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:13%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(i) any 2010 Convertible Notes issued in exchange for Existing Convertible Notes have been issued in accordance with the
terms of the 2010 Convertible Notes Indenture, </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:13%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(ii) the final terms of the Proposed 2010 Convertible Notes
Issuance contained in the 2010 Convertible Notes Indenture and 2010 Convertible Notes: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:17%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(A) with respect to
the restrictions on and priorities of &#147;Indebtedness&#148; and &#147;Liens&#148;, permit the Loan Agreement, the Obligations thereunder, and the Liens securing the same; and </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:17%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(B) do not restrict the principal amount of indebtedness of the &#147;Credit Facility&#148; (or the equivalent term
defined in the 2010 Convertible Notes Indenture) to an amount less than $260,000,000; and </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:13%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(iii) the 2010
Convertible Notes shall at all times remain unsecured; and </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(g) Each Borrower delivers to the Agent such other
agreements as the Agent may reasonably request in connection herewith. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>2. <U>Amendments to Loan Agreement</U>.</B> In
connection with the Proposed 2010 Convertible Notes Issuance, the parties hereto hereby agree to amend the Loan Agreement as follows, <U>provided</U>, <U>that</U> all amendments to the Loan Agreement set forth in this <U>Section&nbsp;2</U> shall
only be effective upon the satisfaction of the conditions (a)&nbsp;through (g)&nbsp;set forth in <U>Section&nbsp;1</U> above: </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(a) By deleting clause (b)&nbsp;of the definition of &#147;<U>Change of Control</U>&#148; contained in <U>Section&nbsp;1.1</U> of the
Loan Agreement, and by substituting in lieu thereof the following: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b) any &#147;Change of Control,&#148; &#147;Change in
Control&#148; or similar event or circumstance, however defined or designated, under the Indenture (as in effect on the date of this Agreement), or any &#147;Change of Control&#148;, &#147;Change in Control&#148;, &#147;Fundamental Change&#148; or
similar event or circumstance, however defined or designated, under (i)&nbsp;the New Convertible Notes or New Convertible Notes Indenture, (ii)&nbsp;the Precision Convertible Notes or the Precision Convertible Notes Indenture, or (iii)&nbsp;the 2010
Convertible Notes or the 2010 Convertible Notes Indenture (as in effect on the effective date thereof) shall occur. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 3 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b) By deleting the definitions of &#147;<U>New Convertible Notes Indenture</U>&#148;,
&#147;<U>New Convertible Notes</U>&#148;, &#147;<U>Precision Convertible Notes</U>&#148;, and &#147;<U>Precision Convertible Notes Indenture</U>&#148; set forth in <U>Section&nbsp;1.1</U> of the Loan Agreement, and by substituting in lieu thereof
the following: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>New Convertible Notes</U> - to the extent not tendered or replaced in connection with the
issuance of the 2010 Convertible Notes, MasTec&#146;s Senior Convertible Notes having a maturity of not sooner than five (5)&nbsp;years from the issuance date thereof in the original principal amount of $100,000,000, issued pursuant to the New
Convertible Notes Indenture, on or before June&nbsp;30, 2009, on an unsecured basis and otherwise on terms satisfactory to Agent and Lenders; <U>provided</U>, <U>that</U>, the original principal amount set forth above may be increased by an amount
of up to $25,000,000 reflecting an oversubscription of the New Convertible Notes issued under the New Convertible Notes Indenture. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><U>New Convertible Notes Indenture</U> - to the extent all of the New Convertible Notes are not tendered or replaced in connection with the issuance of the 2010 Convertible Notes, the supplemental
indenture among MasTec, its Subsidiaries and the trustee named thereunder, as Trustee, governing the New Convertible Notes. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><U>Precision Convertible Notes</U> - to the extent not tendered or replaced in connection with the issuance of the 2010 Convertible Notes, MasTec&#146;s Senior Convertible Notes having a maturity of not
sooner than five (5)&nbsp;years from the issuance date thereof in the original principal amount of up to $100,000,000, but not less than $75,000,000, issued pursuant to the Precision Convertible Notes Indenture, on or before November&nbsp;30, 2009,
on an unsecured basis and otherwise on terms satisfactory to Agent and Lenders. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>Precision Convertible Notes
Indenture</U> - to the extent all of the Precision Convertible Notes are not tendered or replaced in connection with the issuance of the 2010 Convertible Notes, the supplemental indenture to the New Convertible Notes Indenture among MasTec, its
Subsidiaries and U.S. Bank, National Association, as Trustee, governing the Precision Convertible Notes. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(c) By deleting the
definitions of &#147;<U>Fixed Charges</U>&#148; and &#147;<U>Refinancing Conditions</U>&#148; contained in <U>Section&nbsp;1.1</U> of the Loan Agreement, and by substituting in lieu thereof the following new definitions: </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>Fixed Charges</U> - for any fiscal period, the sum of (i)&nbsp;interest expense (other than interest payable-in-kind to
the extent not paid in cash and interest expense arising from this Agreement or the other Loan Documents that is deferred into future periods in accordance with GAAP) for such period <U>plus</U> (ii)&nbsp;current maturities of Funded Debt (including
Capitalized Lease Obligations) as of the last day of such </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 4 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:8%"><FONT STYLE="font-family:Times New Roman" SIZE="2">
period <U>plus</U> (iii)&nbsp;all amounts paid by any Obligor in cash with respect to the 2010 Convertible Notes Indenture and the 2010 Convertible Notes (whether made as a prepayment or
conversion) for such fiscal period. For the avoidance of doubt, to the extent that any portion of the 2010 Convertible Notes is classified for accounting purposes as short-term or current Debt due to the triggering of conversion conditions under the
2010 Convertible Notes, such portion of the 2010 Convertible Notes shall not be included in the calculation of Fixed Charges, unless actually paid in cash. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2"><U>Refinancing Conditions</U> - the following conditions, each of which must be satisfied before Refinancing Debt shall be permitted under <B>Section&nbsp;10.2.3</B> of this Agreement: (i)&nbsp;the
Refinancing Debt is in an aggregate principal amount that does not exceed the aggregate principal amount of the Debt being extended, renewed or refinanced (or in the case of each of (A)&nbsp;the Indenture and the Senior Notes, (B)&nbsp;the New
Convertible Notes Indenture and the New Convertible Notes, (C)&nbsp;the Precision Convertible Notes Indenture and the Precision Convertible Notes, and (D)&nbsp;the 2010 Convertible Notes Indenture and the 2010 Convertible Notes, the original
principal amount of the Senior Notes, the New Convertible Notes, the Precision Convertible Notes, or the 2010 Convertible Notes, as applicable), (ii)&nbsp;the Refinancing Debt has a later or equal final maturity and a longer or equal weighted
average life than the Debt being extended, renewed or refinanced, (iii)&nbsp;the Refinancing Debt does not bear a rate of interest that exceeds a market rate (as determined in good faith by a Senior Officer) as of the date of such extension, renewal
or refinancing, (iv)&nbsp;if the Debt being extended, renewed or refinanced is subordinate to the Obligations, the Refinancing Debt is subordinated to the same extent, (v)&nbsp;the covenants contained in any instrument or agreement relating to the
Refinancing Debt are no less favorable to Obligors than those relating to the Debt being extended, renewed or refinanced, and (vi)&nbsp;at the time of and after giving effect to such extension, renewal or refinancing, no Default or Event&nbsp;of
Default shall&nbsp;exist. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(d) By adding the following new definitions of &#147;<U>4.00% 2010 Convertible Notes</U>&#148;,
&#147;<U>4.00% 2010 Convertible Notes Indenture</U>&#148;, &#147;<U>4.25% 2010 Convertible Notes</U>&#148;, &#147;<U>4.25% 2010 Convertible Notes Indenture</U>&#148;, &#147;<U>2010 Convertible Notes</U>&#148;, and &#147;<U>2010 Convertible Notes
Indenture</U>&#148; to <U>Section&nbsp;1.1</U> of the Loan Agreement, in proper alphabetical sequence: </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>4.00% 2010 Convertible Notes</U> - convertible notes by Obligors having a maturity of June&nbsp;15, 2014 in the
original principal amount of up to $115,000,000, issued pursuant to the 4.00% 2010 Convertible Notes Indenture, on or before January&nbsp;31, 2011, on an unsecured basis and otherwise on terms satisfactory to Agent and Lenders. </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>4.00% 2010 Convertible Notes Indenture</U><B><I></I></B> - the Supplemental Indenture among MasTec, its Subsidiaries
and the trustee named thereunder, as Trustee, governing the 4.00% 2010 Convertible Notes, which Indenture shall be in form and substance satisfactory to Agent and Lenders. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 5 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>4.25% 2010 Convertible Notes</U> - convertible notes by Obligors having a
maturity of December&nbsp;15, 2014 in the original principal amount of up to $100,000,000, issued pursuant to the 4.25% 2010 Convertible Notes Indenture, on or before January&nbsp;31, 2011, on an unsecured basis and otherwise on terms satisfactory
to Agent and Lenders. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>4.25% 2010 Convertible Notes Indenture</U><B><I></I></B> - the Supplemental Indenture
among MasTec, its Subsidiaries and the trustee named thereunder, as Trustee, governing the 4.25% 2010 Convertible Notes, which Indenture shall be in form and substance satisfactory to Agent and Lenders. </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>2010 Convertible Notes</U> - collectively, the 4.00% 2010 Convertible Notes and the 4.25% 2010 Convertible Notes.
</FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><U>2010 Convertible Notes Indenture</U> - collectively, the 4.00% 2010 Convertible Notes Indenture and the
4.25% 2010 Convertible Notes Indenture. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(e) By deleting subclause (z)&nbsp;of <U>Section&nbsp;2.1.3</U> of the Loan Agreement
in its entirety, and by substituting in lieu thereof the following new subclause (z): </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(z) to defease, redeem,
refinance or convert to cash any of the Senior Notes, the New Convertible Notes, the Precision Convertible Notes, or the 2010 Convertible Notes. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">(f) By deleting <U>Section&nbsp;10.1.13</U> of the Loan Agreement in its entirety, and by substituting in lieu thereof the following new <U>Section&nbsp;10.1.13</U>: </FONT></P>
<P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">10.1.13. <U>Compliance with Indenture and 2010 Convertible Notes Indenture</U>. Comply with the terms and provisions of
(a)&nbsp;the Indenture and the Senior Notes, (b)&nbsp;the New Convertible Notes Indenture and the New Convertible Notes, (c)&nbsp;the Precision Convertible Notes Indenture and the Precision Convertible Notes and (d)&nbsp;the 2010 Convertible Notes
Indenture and the 2010 Convertible Notes. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(g) By deleting subclause (ii)&nbsp;of <U>Section&nbsp;10.2.3</U> of the Loan
Agreement in its entirety, and by substituting in lieu thereof the following new subclause (ii): </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(ii) each of
the Senior Notes, the New Convertible Notes, the Precision Convertible Notes, and the 2010 Convertible Notes; </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(h) By deleting
the final paragraph of <U>Section&nbsp;10.2.3</U> of the Loan Agreement, and by substituting in lieu thereof the following new final paragraph: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT
STYLE="font-family:Times New Roman" SIZE="2">None of the provisions of this <B>Section&nbsp;10.2.3</B> that authorize any Obligor to incur any Debt shall be deemed to (A)&nbsp;override, modify or waive any of the provisions of
<B>Section&nbsp;10.3</B>, which shall constitute an independent&nbsp;and separate covenant and obligation of each Borrower, or (B)&nbsp;permit any Obligor to incur any Debt in violation of any provision of the Indenture, the New Convertible Notes
Indenture, the Precision Convertible Notes Indenture, or the 2010 Convertible Notes Indenture. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 6 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(i) By deleting <U>Section&nbsp;10.2.6</U> of the Loan Agreement, and by substituting in
lieu thereof the following new <U>Section&nbsp;10.2.6</U>: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">10.2.6 <U>Restrictions on Payment of Certain
Debt</U>. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(a) Make any payment with respect to any Subordinated Debt or take or omit to take any other action
with respect to any Subordinated Debt, except&nbsp;in&nbsp;accordance with the subordination agreement relative thereto; or amend or modify the terms of any&nbsp;agreement applicable to any Subordinated Debt, other than to extend the time of payment
thereof or to reduce the rate of interest payable in connection therewith. To the extent that any payment is permitted to be made with respect to any Subordinated Debt pursuant to the provisions of the subordination agreement applicable thereto, as
a condition precedent to Borrowers&#146; authorization to make any such payment, Borrowers shall provide to Agent, not less than 5 Business Days prior to the scheduled payment, a&nbsp;certificate from a Senior Officer of Borrower Agent stating that
no Default or Event of Default is in existence as of the date of the certificate or will be in existence as of the date of such payment (both with and without&nbsp;giving effect to the making of such payment), and specifying the amount of principal
and interest to be paid. </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(b) Notwithstanding anything in this Agreement to the contrary, in no event shall any
Obligor or any Subsidiary defease, redeem, refinance or convert to cash any of the 2010 Convertible Notes without the prior written consent of Agent and Required Lenders, <U>provided</U> <U>that</U>, Obligors may defease, redeem, refinance or
convert to cash any of the 2010 Convertible Notes without the prior written consent of Agent and Required Lenders so long as either (i)&nbsp;any such refinancing satisfies the Refinancing Conditions or (ii)&nbsp;the 2010 Convertible Notes Repayment
or Conversion Conditions are satisfied. As used herein, &#147;<U>2010 Convertible Notes Repayment or Conversion Conditions</U>&#148; means, with respect to any defeasance, redemption, refinancing or conversion to cash of any of the 2010 Convertible
Notes, (i)&nbsp;the aggregate amount of the 2010 Convertible Notes that have been defeased, redeemed, refinanced or converted to cash by Obligors does not exceed, after giving effect to such defeasance, redemption, refinancing or conversion,
$10,000,000, and (ii)&nbsp;at the time of and after giving pro forma effect to such defeasance, redemption, refinancing or conversion to cash, as applicable, (A)&nbsp;no Default or Event of Default exists, (B)&nbsp;Borrowers shall have a Fixed
Charge Coverage Ratio of not less than 1.20 to 1.00 for the most recently completed twelve-month period prior to the date of such defeasance, redemption, refinancing or conversion to cash, and (C)&nbsp;Availability shall be equal to or greater than
$25,000,000 at such time and for the most recently completed 90-day period prior to the date of such defeasance, redemption, refinancing or conversion to cash. </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 7 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(j) By deleting <U>Section&nbsp;10.2.24</U> of the Loan Agreement in its entirety, and by
substituting in lieu thereof the following new <U>Section&nbsp;10.2.24</U>: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">10.2.24. <U>Amendments to Other
Agreements</U>. Amend the interest rate or principal amount or schedule of payments of principal and interest with respect to any Debt (other than the Obligations), or any dividend rate or redemption schedule applicable to any preferred stock of an
Obligor, other than to reduce the interest or dividend rate or to extend any such schedule of payments or redemption schedule, or amend or cause or permit to be amended in any material respect, or in any respect that may be adverse to the interests
of Agent or Lenders, (i)&nbsp;the Indenture or any other agreement at any time governing or evidencing Subordinated Debt, (ii)&nbsp;the New Convertible Notes Indenture or any other agreement at any time governing or evidencing the New Convertible
Notes, (iii)&nbsp;the Precision Convertible Notes Indenture or any other agreement at any time governing or evidencing the Precision Convertible Notes, (iv)&nbsp;the 2010 Convertible Notes Indenture or any other agreement at any time governing or
evidencing the 2010 Convertible Notes, or (v)&nbsp;the general indemnity agreement between any Obligor and any surety that has issued any outstanding surety bonds for the account of such Obligor or any related intercreditor agreement. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">(k) By deleting <U>Section&nbsp;12.1.6</U> of the Loan Agreement in its entirety, and by substituting in lieu thereof the following new
<U>Section&nbsp;12.1.6</U>: </FONT></P> <P STYLE="margin-top:6px;margin-bottom:0px; margin-left:8%; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">12.1.6 <U>Other Defaults</U>. There shall occur any default or event of default on
the part of any Obligor or any Subsidiary under (i)&nbsp;the Indenture, (ii)&nbsp;the New Convertible Notes Indenture, (iii)&nbsp;the Precision Convertible Notes Indenture, (iv)&nbsp;the 2010 Convertible Notes Indenture, or (v)&nbsp;under any other
agreement, document or instrument to which such Obligor or such Subsidiary is a party or by which such Obligor or such Subsidiary or any of their respective Properties is bound, creating or relating to any Debt (other than the Obligations) in excess
of $2,500,000, in each case under this clause (v)&nbsp;if the&nbsp;payment or maturity of such Debt may be accelerated in consequence of such default or event of default or demand for payment of such Debt may be made. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>3. <U>Expenses of Agent</U>.</B> To induce the Agent and the Lenders to enter into this consent and letter amendment and grant the
accommodations set forth herein, Borrowers hereby jointly and severally agree to pay, on the date hereof any other fee required by the Agent individually, and <B>on demand</B>, all costs and expenses incurred by the Agent in connection with the
preparation, negotiation and execution of this consent and letter amendment and any other Loan Documents executed pursuant hereto and any and all amendments, modifications, and supplements thereto, including, without limitation, the costs and fees
of the Agent&#146;s legal counsel and any taxes or expenses associated with or incurred in connection with any instrument or agreement referred to herein or contemplated hereby. </FONT></P>
<P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>4. <U>Miscellaneous</U>. </B>The consents, amendments and agreements set forth herein shall be effective, subject to the foregoing
conditions, when the Agent receives five (5)&nbsp;counterparts of this consent and letter amendment, duly executed by each Borrower and the Lenders. The consents, </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 8 -
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 <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">
amendments and agreements herein are limited as written and do not constitute consents, amendments, waivers or releases by the Agent or any Lender of any provision of the Loan Agreement or any
right of the Agent or any Lender thereunder, except as expressly set forth herein. This consent and letter amendment shall be part of the Loan Agreement and a breach of any representation, warranty or covenant herein shall constitute an Event of
Default. Nothing herein shall be construed to be an admission by Borrowers that the Agent&#146;s and the Lenders&#146; consent or acknowledgment is required with respect to future acquisitions constituting Permitted Acquisitions under the Loan
Agreement. <B>To the fullest extent permitted by Applicable Law, the parties hereto each hereby waives the right to trial by jury in any action, suit, counterclaim or proceeding arising out of or related to this consent and letter amendment</B>.
</FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">[Remainder of page intentionally left blank.] </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">- 9 -
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 <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:4%"><FONT STYLE="font-family:Times New Roman" SIZE="2">This consent and letter amendment shall be governed by and construed in accordance with the
internal laws of the State of Georgia and shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns. This consent and letter amendment may be executed in any number of counterparts and by
different parties to this consent and letter amendment on separate counterparts, each of which, when so executed, shall be deemed an original, but all such counterparts shall constitute one and the same amendment. Any signature page counterpart
delivered by a party by facsimile or electronic transmission shall be deemed to be an original signature page counterpart hereto. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><DIV ALIGN="right">
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<TD WIDTH="12%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="80%"></TD></TR>
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<TD VALIGN="top" COLSPAN="5"> <P STYLE="margin-left:1.00em; text-indent:-1.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">Very truly yours,</FONT></P></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="5"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="5"> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>BANK OF AMERICA, N.A.</B>,</FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px"><FONT
STYLE="font-family:Times New Roman" SIZE="2">as Agent and a Lender</FONT></P></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="4"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ Dennis S. Losin</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Dennis Losin</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Senior Vice President</FONT></TD></TR></TABLE></DIV> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">[Signatures
continue on following page.] </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter
Agreement Regarding 2010 Convertible Notes Issuance </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">and Amendments to Loan Agreement </FONT></P>


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<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>GENERAL ELECTRIC CAPITAL CORPORATION, </B>as a Lender<B></B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ Brian Miner</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name: Brian Miner</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title: Duly Authorized Signatory</FONT></TD></TR></TABLE></DIV>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">[Signatures continue on following page.] </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter
Agreement Regarding 2010 Convertible Notes Issuance </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">and Amendments to Loan Agreement </FONT></P>


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<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0">

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<TD WIDTH="6%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="93%"></TD></TR>
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<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>SIEMENS FINANCIAL SERVICES, INC.</B>,<B></B></FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px"><FONT
STYLE="font-family:Times New Roman" SIZE="2">as a Lender</FONT></P></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ Doug Maher</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name: Doug Maher</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title: Vice President</FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ Jennifer Humphrey</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name: Jennifer Humphrey</FONT></TD></TR>
<TR>
<TD VALIGN="top"></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title: Vice President, Operations</FONT></TD></TR></TABLE></DIV>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">[Signatures continue on following page.] </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter
Agreement Regarding 2010 Convertible Notes Issuance </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">and Amendments to Loan Agreement </FONT></P>


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<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><U>BORROWERS</U>:</B></FONT></TD></TR>
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<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
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<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC CONTRACTING COMPANY, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC SERVICES COMPANY, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC NORTH AMERICA, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>CHURCH&nbsp;&amp; TOWER, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>POWER PARTNERS MASTEC, LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>GLOBETEC CONSTRUCTION, LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: <U></U></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR></TABLE></DIV> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT
STYLE="font-family:Times New Roman" SIZE="2">[Signatures continue on following page.] </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter
Agreement Regarding 2010 Convertible Notes Issuance </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">and Amendments to Loan Agreement </FONT></P>


<p Style='page-break-before:always'>
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<TD WIDTH="12%"></TD>
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<TD WIDTH="87%"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>THREE PHASE LINE CONSTRUCTION, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ Stanley Tedder</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Stanley Tedder</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Chief Executive Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PUMPCO, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Vice President</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>NSORO MASTEC, LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Vice President</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>WANZEK CONSTRUCTION, INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Vice President</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC RESIDENTIAL SERVICES, LLC</B></FONT></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"> <P STYLE="margin-top:0px;margin-bottom:0px; text-indent:2.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>By: MasTec North America, Inc.</B>, its sole<B></B></FONT></P>
<P STYLE="margin-top:0px;margin-bottom:1px; text-indent:2.00em"><FONT STYLE="font-family:Times New Roman" SIZE="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Member</B></FONT></P></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PRECISION PIPELINE LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2">By: Precision Acquisition, LLC, its sole member</FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer of MasTec Inc., sole member of Precision Acquisition, LLC</FONT></TD></TR></TABLE></DIV>
<P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT STYLE="font-family:Times New Roman" SIZE="2">[Signatures continue on following page.] </FONT></P>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter
Agreement Regarding 2010 Convertible Notes Issuance </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">and Amendments to Loan Agreement </FONT></P>


<p Style='page-break-before:always'>
<HR  SIZE="3" style="COLOR:#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P><DIV ALIGN="right">
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="40%" BORDER="0">

<TR>
<TD WIDTH="12%"></TD>
<TD VALIGN="bottom" WIDTH="1%"></TD>
<TD WIDTH="87%"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PRECISION TRANSPORT COMPANY, LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Precision Acquisition, LLC, its sole member</FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer of MasTec Inc., sole member of Precision Acquisition, LLC</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B><U>GUARANTORS</U>:</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PHASECOM SYSTEMS INC.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>INTEGRAL POWER&nbsp;&amp; TELECOMMUNICATIONS CORPORATION LTD.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>MASTEC WIRELESS SERVICES, LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>THREE PHASE ACQUISITION CORP.</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR>
<TR>
<TD HEIGHT="16" COLSPAN="3"></TD></TR>
<TR>
<TD VALIGN="top" COLSPAN="3"><FONT STYLE="font-family:Times New Roman" SIZE="2"><B>PRECISION ACQUISITION, LLC</B></FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">MasTec, Inc., its sole member</FONT></TD></TR>
<TR>
<TD HEIGHT="16"></TD>
<TD HEIGHT="16" COLSPAN="2"></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">By:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT STYLE="font-family:Times New Roman" SIZE="2">/s/ C. Robert Campbell</FONT></P></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Name:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">C. Robert Campbell</FONT></TD></TR>
<TR>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Title:</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="top"><FONT STYLE="font-family:Times New Roman" SIZE="2">Executive Vice President and Chief Financial Officer</FONT></TD></TR></TABLE></DIV>
 <p STYLE="margin-top:0px;margin-bottom:0px"><FONT SIZE="1">&nbsp;</FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">Consent and Letter
Agreement Regarding 2010 Convertible Notes Issuance </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"><FONT STYLE="font-family:Times New Roman" SIZE="2">and Amendments to Loan Agreement </FONT></P>

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