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<SEC-DOCUMENT>0000950134-07-023758.txt : 20071113
<SEC-HEADER>0000950134-07-023758.hdr.sgml : 20071112
<ACCEPTANCE-DATETIME>20071113101546
ACCESSION NUMBER:		0000950134-07-023758
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20071113
DATE AS OF CHANGE:		20071113
EFFECTIVENESS DATE:		20071113

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATURAL GAS SERVICES GROUP INC
		CENTRAL INDEX KEY:			0001084991
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL, GAS FIELD SERVICES, NBC [1389]
		IRS NUMBER:				752811855

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-147311
		FILM NUMBER:		071235240

	BUSINESS ADDRESS:	
		STREET 1:		2911 SCR 1260
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79706
		BUSINESS PHONE:		9155633974

	MAIL ADDRESS:	
		STREET 1:		2911 SCR 1260
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79706
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>d51488sv8.htm
<DESCRIPTION>FORM S-8
<TEXT>
<HTML>
<HEAD>
<TITLE>sv8</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">As
filed with the Securities and Exchange Commission on November&nbsp;13, 2007</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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    <TD width="47%"></TD>
    <TD width="5%"></TD>
    <TD width="47%"></TD>
</TR>
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<TR valign="bottom">
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="left" valign="top">&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">Registration No.&nbsp;333 - &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>WASHINGTON, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>Form&nbsp;S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933</B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>Natural Gas Services Group, Inc.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact Name of Registrant as Specified in Its Charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">Colorado
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">75-2811855</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or Other Jurisdiction of
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">Incorporation or Organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Identification No.)</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">2911 South County Road 1260
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">79706</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">Midland, Texas
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Zip Code)</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(Address of Principal Executive Offices)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Natural Gas Services Group, Inc.<BR>
1998 Stock Option Plan<BR>
(Full Title of the Plan)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Stephen C. Taylor<BR>
Chairman of the Board, President<BR>
and Chief Executive Officer<BR>
2911 South County Road 1260<BR>
Midland, Texas 79706<BR>
(Name and Address of Agent For Service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">432-563-3974<BR>
(Telephone Number, Including Area Code, of Agent for Service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">Copy to:<BR>
Thomas W. Ortloff<BR>
Lynch, Chappell &#038; Alsup, P.C.<BR>
300 N. Marienfeld, Suite&nbsp;700<BR>
Midland, Texas 79701<BR>
(432)&nbsp;683-3351</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">CALCULATION OF REGISTRATION FEE</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="17%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="17%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Title of Each Class</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount of</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">of Securities To Be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount to be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Offering Price</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Aggregate</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registration</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Per Share<SUP style="font-size: 85%; vertical-align: text-top">(1)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Offering Price</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Fee</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common Stock,
$.01 par value</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">400,000<SUP style="font-size: 85%; vertical-align: text-top">(2)</SUP></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$19.12</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$7,648,000</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$234.80</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>



<DIV style="margin-top: 3pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Estimated solely for the purpose of calculating the registration fee pursuant to Rule&nbsp;457(h),
on the basis of the average of the high and low sales prices of the Registrant&#146;s Common Stock
as reported on the American Stock Exchange on November&nbsp;7, 2007, within five business days
prior to filing.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>In accordance with Rule&nbsp;416, this Registration Statement shall also cover any additional
shares of the Registrant&#146;s common stock that become issuable by reason of any stock split,
stock dividend, recapitalization or any other similar transaction, as provided by the
Registrant&#146;s 1998 Stock Option Plan.</TD>
</TR>

</TABLE>
</DIV>


<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">





<DIV align="center" style="font-size: 10pt; margin-top: 18pt">EXPLANATORY NOTE
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement on Form S-8 relates to the registration of 400,000 additional
shares of common stock authorized for issuance under the Registrant&#146;s 1998 Stock Option Plan, as
amended. Pursuant to General Instruction E of Form S-8, the contents of the Registrant&#146;s
Registration Statement on Form&nbsp;S-8, No.&nbsp;333-110954, filed by the Registrant with the Securities and
Exchange Commission on December&nbsp;5, 2003, are hereby incorporated by reference.
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">PART II

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Item&nbsp;8. Exhibits

</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="8%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="89%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Exhibit No.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Description</TD>
</TR>
<TR><TD>&nbsp;</TD></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">*5
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Lynch, Chappell &#038; Alsup, a Professional Corporation</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">10.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">1998 Stock Option Plan, as amended (Incorporated by reference
to Exhibit&nbsp;10.1 of the Registrant&#146;s Form&nbsp;8-K Report dated May
9, 2006 and filed with the Securities and Exchange Commission
on May&nbsp;15, 2006 )</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">*23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Lynch, Chappell &#038; Alsup, a Professional
Corporation (contained in Exhibit&nbsp;No.&nbsp;5)</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">*23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Hein &#038; Associates LLP</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="bottom"><DIV style="margin-left:0px; text-indent:-0px">*24
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney contained on Page
3 hereof</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<DIV align="left"><DIV style="font-size: 3pt; margin-top: 13pt; width: 18%; border-bottom: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>



<DIV style="margin-top: 3pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Filed herewith</TD>
</TR>

</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->2<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">SIGNATURES
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by
the undersigned, thereunto duly authorized, in the City of Midland, State of Texas, on the 12th day
of November, 2007.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">NATURAL GAS SERVICES GROUP, INC.<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Stephen C. Taylor
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Stephen C. Taylor&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Chairman of the Board, President<BR>
and Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">POWER OF ATTORNEY

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and
appoints Stephen C. Taylor and Earl R. Wait, and each of them, either one of whom may act without
joinder of the other, his true and lawful attorneys-in-fact and agents, with full power of
substitution and resubstitution, for him in his name, place and stead, in any and all capacities,
to sign any and all amendments to this Registration Statement, and to file the same, with all
exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them severally, full power
and authority to do and to perform each and every act and thing requisite and necessary to be done
in and about the premises, as fully and to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and each of
them, or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration
Statement has been below by the following persons in the capacities and on the dates indicated.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="35%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="60%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Signature</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Title</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Date</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;/s/ Stephen C. Taylor&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chairman of the Board,&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Stephen C. Taylor
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">President, Chief Executive
Officer and Director<br>
(Principal Executive Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Earl R. Wait&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President &#151; Accounting&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Earl R. Wait
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">(Principal Accounting and
Principal Financial Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->3<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="35%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="20%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Signature</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Title</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Date</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Alan A. Baker&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Alan A. Baker</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ John W.Chisholm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">John W. Chisholm</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Charles G. Curtis</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Paul D. Hensley</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ William F. Hughes, Jr.&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">William F. Hughes, Jr.</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Gene A. Strasheim&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Gene A. Strasheim</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Richard L. Yadon&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;12, 2007</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Richard L. Yadon</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->4<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">EXHIBIT INDEX
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="8%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Exhibit No.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Description</TD>
</TR>
<TR><TD>&nbsp;</TD></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*5
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Lynch, Chappell &#038; Alsup, a Professional Corporation</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">10.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">1998 Stock Option Plan, as amended (Incorporated by reference
to Exhibit&nbsp;10.1 of the Registrant&#146;s Form&nbsp;8-K Report dated May
9, 2006 and filed with the Securities and Exchange Commission
on May&nbsp;15, 2006 )</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Lynch, Chappell &#038; Alsup, a Professional
Corporation (contained in Exhibit&nbsp;No.&nbsp;5)</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Hein &#038; Associates LLP</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*24
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney contained on Page
3 hereof</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<DIV align="left"><DIV style="font-size: 3pt; margin-top: 13pt; width: 18%; border-bottom: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>



<DIV style="margin-top: 3pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Filed herewith</TD>
</TR>

</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->5<!-- /Folio -->
</DIV>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5
<SEQUENCE>2
<FILENAME>d51488exv5.htm
<DESCRIPTION>OPINION OF LYNCH, CHAPPELL & ALLSUP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv5</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Exhibit&nbsp;5
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">LYNCH, CHAPPELL &#038; ALSUP<BR>
A PROFESSIONAL CORPORATION<BR>
ATTORNEYS<BR>
THE SUMMIT, SUITE 700<BR>
300 NORTH MARIENFELD<BR>
MIDLAND, TEXAS 79701<BR>
TELEPHONE: (432)&nbsp;683-3351<BR>
FACSIMILE: (432)&nbsp;683-8346
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt">November&nbsp;12, 2007

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Natural Gas Services Group, Inc.<BR>
2911 South County Road 1260<BR>
Midland, Texas 79706

</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="8%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Re:
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Natural Gas Services Group, Inc. 1998 Stock Option Plan; Sale of up to 400,000
additional shares of common stock</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Gentlemen:

</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We have acted as counsel to Natural Gas Services Group, Inc., a Colorado corporation (the
&#147;Company&#148;), in connection with the proposed issuance and sale by the Company of up to 400,000
additional shares of Common Stock, $.01 par value (&#147;Common Stock&#148;), of the Company pursuant to the
exercise of stock options granted or to be granted by the Company under the Company&#146;s 1998 Stock
Option Plan (the &#147;Plan&#148;), as further described in a Registration Statement on Form S-8 filed by the
Company with the Securities and Exchange Commission (herein referred to as the &#147;Registration
Statement&#148;).
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We have made such inquiries and examined such documents as we have considered necessary or
appropriate for the purpose of giving the opinions hereinafter set forth. We have assumed the
genuineness and authenticity of all signatures on all original documents, the authenticity of all
documents submitted to us as originals, the conformity to originals of all documents submitted to
us as copies and the due authorization, execution, delivery or recordation of all documents where
due authorization, execution or recordation are prerequisites to the effectiveness thereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Based upon the foregoing, and having regard for such legal considerations as we deem relevant,
we are of the opinion that the Plan has been duly and validly authorized and adopted, and the
400,000 shares of Common Stock that may be issued and sold by the Company from time to time upon
the exercise of stock options granted or to be granted in accordance with the Company&#146;s Plan will,
upon issuance and delivery against payment therefor, be legally issued, fully paid and
nonassessable.
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We hereby consent to the filing of this opinion with the Securities and Exchange Commission as
an exhibit to the Registration Statement. In giving such consent, we do not thereby concede that we
are within the category of persons whose consent is required under Section&nbsp;7 of the Securities Act
of 1933, as amended, or the rules and regulations of the Securities and Exchange Commission
thereunder.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">Very truly yours,<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD colspan="3" style="border-bottom: 0px solid #000000" align="left">/s/ Lynch, Chappell &#038; Alsup, P.C.
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
</TABLE>


<P align="center" style="font-size: 10pt"><!-- Folio -->2<!-- /Folio -->
</DIV>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>d51488exv23w2.htm
<DESCRIPTION>CONSENT OF HEIN & ASSOCIATES LLP
<TEXT>
<HTML>
<HEAD>
<TITLE>exv23w2</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Exhibit&nbsp;23.2
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><U>Consent of Independent Registered Public Accounting Firm</U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The Board of Directors<BR>
Natural Gas Services Group, Inc.

</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">We consent to the incorporation by reference in this Registration Statement on Form S-8 of Natural
Gas Services Group, Inc. of our report dated March&nbsp;12, 2007 relating to our audit of the
consolidated financial statements, and internal control over financial reporting for the year ended
December&nbsp;31, 2006; and our audit of the consolidated financial statements for the year ended
December&nbsp;31, 2005, included in the Annual Report on Form 10-K and Form 10-K/A of Natural Gas
Services Group, Inc.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="0%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="63%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD colspan="3" style="border-bottom: 0px solid #000000" align="left">/s/ Hein &#038; Associates LLP
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Dallas, Texas<BR>
November&nbsp;8, 2007

</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
