<SUBMISSION>
<ACCESSION-NUMBER>0001144204-12-018326
<TYPE>SC 14D9/A
<PUBLIC-DOCUMENT-COUNT>2
<FILING-DATE>20120330
<DATE-OF-FILING-DATE-CHANGE>20120330
<SUBJECT-COMPANY>
<COMPANY-DATA>
<CONFORMED-NAME>ATS CORP
<CIK>0001325460
<ASSIGNED-SIC>8742
<IRS-NUMBER>113747950
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>SC 14D9/A
<ACT>34
<FILE-NUMBER>005-81087
<FILM-NUMBER>12726352
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>7925 JONES BRANCH DRIVE
<CITY>MCLEAN
<STATE>VA
<ZIP>22102
<PHONE>571-766-2400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>7925 JONES BRANCH DRIVE
<CITY>MCLEAN
<STATE>VA
<ZIP>22102
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Federal Services Acquisition CORP
<DATE-CHANGED>20050429
</FORMER-COMPANY>
</SUBJECT-COMPANY>
<FILED-BY>
<COMPANY-DATA>
<CONFORMED-NAME>ATS CORP
<CIK>0001325460
<ASSIGNED-SIC>8742
<IRS-NUMBER>113747950
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
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<FILING-VALUES>
<FORM-TYPE>SC 14D9/A
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<BUSINESS-ADDRESS>
<STREET1>7925 JONES BRANCH DRIVE
<CITY>MCLEAN
<STATE>VA
<ZIP>22102
<PHONE>571-766-2400
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<MAIL-ADDRESS>
<STREET1>7925 JONES BRANCH DRIVE
<CITY>MCLEAN
<STATE>VA
<ZIP>22102
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Federal Services Acquisition CORP
<DATE-CHANGED>20050429
</FORMER-COMPANY>
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<DOCUMENT>
<TYPE>SC 14D9/A
<SEQUENCE>1
<FILENAME>v307768_sc14d9a.htm
<DESCRIPTION>FORM SC 14D9/A
<TEXT>
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<P STYLE="margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 14D-9</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Amendment No. 6)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SOLICITATION/RECOMMENDATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>STATEMENT UNDER SECTION 14(d)(4) OF THE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES EXCHANGE ACT OF 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 24pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>ATS Corporation</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>(Name of Subject Company)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 24pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>ATS Corporation</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>(Name of Person Filing Statement)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>COMMON STOCK, PAR VALUE $0.0001 PER SHARE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>(Title of Class of Securities)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>00211E104</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>(CUSIP Number of Class of Securities)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Pamela Little</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Co-Chief Executive Officer and Chief
Financial Officer</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>ATS Corporation</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>7925 Jones Branch Drive</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>McLean, VA 22102</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Telephone: (571) 766-2400</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>(Name, address and telephone numbers
of person authorized to receive notices and</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>communications on behalf of the persons
filing statement)</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>With copies to:</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Squire Sanders (US) LLP</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>1200 19<SUP>th</SUP> Street, NW<BR>
Suite 300<BR>
Washington, D.C. 20036</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Attention: James J. Maiwurm</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Telephone: (202) 626-6600</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">&#61551; Check the box if the filing relates
solely to preliminary communications made before the commencement of a tender offer.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">This Amendment No. 6 (this &ldquo;<U>Amendment</U>&rdquo;)
amends and supplements the Solicitation/Recommendation Statement on Schedule 14D-9 (together with any amendments and supplements
thereto, the &ldquo;<U>Schedule 14D-9</U>&rdquo;) filed by ATS Corporation, a Delaware corporation (&ldquo;<U>ATS</U>&rdquo; or
the &ldquo;<U>Company</U>&rdquo;) with the Securities and Exchange Commission (the &ldquo;<U>SEC</U>&rdquo;) on February 29, 2012,
as amended by Amendment No. 1 to the Schedule 14D-9 filed on March 6, 2012, Amendment No. 2 to the Schedule 14D-9 filed on March
9, 2012, Amendment No. 3 to the Schedule 14D-9 filed on March 16, 2012, Amendment No. 4 to the Schedule 14D-9 filed on March 23,
2012 and Amendment No. 5 to the Schedule 14D-9 filed on March 28, 2012. The Schedule 14D-9 relates to the tender offer by Atlas
Merger Subsidiary, Inc., a Delaware corporation (the &ldquo;<U>Offeror</U>&rdquo;) and wholly owned subsidiary of Salient Federal
Solutions, Inc., a Delaware corporation (&ldquo;<U>Parent</U>&rdquo;), to purchase all outstanding shares of the Company&rsquo;s
common stock, par value $0.0001 per share (the &ldquo;<U>Shares</U>&rdquo;), at $3.20 per Share in cash, without interest, upon
the terms and subject to the conditions set forth in the Offer to Purchase, dated February 28, 2012 (the &ldquo;<U>Offer to Purchase</U>&rdquo;),
and in the related Letter of Transmittal (which, together with any amendments or supplements, collectively constitute the &ldquo;<U>Offer</U>&rdquo;).
The Offer is described in a Tender Offer Statement on Schedule TO filed by the Offeror and Parent with the SEC on February 28,
2012, as amended by the Amendment No. 1 to the Schedule TO filed on March 1, 2012, the Amendment No. 2 to the Schedule TO filed
on March 6, 2012<B>,</B> the Amendment No. 3 to the Schedule TO filed on March 9, 2012, the Amendment No. 4 to the Schedule TO
filed on March 16, 2012, the Amendment No. 5 to the Schedule TO filed on March 23, 2012, the Amendment No. 6 to the Schedule TO
filed on March 28, 2012 and the Amendment No. 7 to the Schedule TO filed on March 30, 2012. The Offer to Purchase and the Letter
of Transmittal were filed with the Schedule 14D-9 as Exhibits (a)(1)(A) and (a)(1)(B), respectively.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">Except as otherwise set forth below, the
information set forth in the Schedule 14D-9 remains unchanged and is incorporated by reference as relevant to the items in this
Amendment. Capitalized terms used and not defined herein shall have the meanings assigned to such terms in the Schedule 14D-9.
This Amendment is being filed to reflect certain updates as reflected below.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>ITEM 8&#9;ADDITIONAL INFORMATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">Item&nbsp;8 of the Schedule&nbsp;14D-9
is hereby amended and supplemented by adding the following text at the end of Item&nbsp;8:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">&ldquo;<B><I>Completion of the Offer</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">On
March 30, 2012, the Company and Parent issued a press release announcing that at 11:59 pm, New York City time, on Thursday,
March 29, 2012, the Offer expired as scheduled. The Offer was not further extended. Approximately 22,552,686 shares of the
Company Common Stock were tendered and not validly withdrawn prior to the expiration of the Offer, including approximately
215,861 shares subject to guaranteed delivery procedures. The Offeror has accepted all tendered and not validly withdrawn
shares of the Company Common Stock for payment. The shares of the Company Common Stock tendered and not validly withdrawn
represent approximately 97% of the outstanding shares of the Company Common Stock. A copy of the press release announcing
the expiration of the Offer is filed as Exhibit (a)(13) hereto and is incorporated herein by reference.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 23.75pt">Upon acceptance
of such shares, Offeror owned more than 90% of the outstanding shares of the Company Common Stock and the Offeror is expected
to complete the acquisition of the Company on March 30, 2012 through the short-form merger procedure under the DGCL, without
a vote or meeting of the Company&rsquo;s shareholders.&rdquo;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="margin: 0; font-size: 10pt; font-weight: bold">ITEM 9. &nbsp; EXHIBITS.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt">Item 9 of the Schedule 14D-9 is hereby amended
and supplemented by adding the following exhibit:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; width: 12pt; text-indent: 0">&nbsp;</TD>
    <TD NOWRAP STYLE="padding: 0; font-weight: bold; width: 12%; text-indent: 0">Exhibit No.</TD>
    <TD STYLE="padding: 0; width: 2%; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; width: 2%; text-indent: 0">&nbsp;</TD>
    <TD NOWRAP STYLE="padding: 0; font-weight: bold; width: 80%; text-indent: 0">Description</TD>
    <TD STYLE="padding: 0; width: 2%; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">(a)(13)</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Joint Press Release issued by ATS Corporation and Salient Federal Solutions on March 30, 2012.</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt">After due inquiry and to the best of my knowledge
and belief, I certify that the information set forth in this Statement is true, complete and correct.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 10pt; padding: 0; text-indent: 0">ATS Corporation</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; padding: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="font-size: 10pt; padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="font-size: 10pt; padding: 0; text-indent: 0">By:</TD>
    <TD COLSPAN="2" STYLE="font-size: 10pt; padding: 0; text-indent: 0; border-bottom: Black 1pt solid">/s/ Pamela A. Little</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 56%; padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 4%; padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 6%; font-size: 10pt; padding: 0; text-indent: 0">Name:</TD>
    <TD STYLE="width: 34%; font-size: 10pt; padding: 0; text-indent: 0">Pamela A. Little</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="font-size: 10pt; padding: 0; text-indent: 0">Title:</TD>
    <TD STYLE="font-size: 10pt; padding: 0; text-indent: 0">Co-Chief Executive Officer and Chief Financial Officer</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 12pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Dated: March 30, 2012</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>



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<TYPE>EX-99.(A)(13)
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<P STYLE="margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SALIENT FEDERAL SOLUTIONS ANNOUNCES EXPIRATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>OF TENDER OFFER FOR SHARES OF ATS CORPORATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><I>Merger Expected to Close Later Today</I></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 24.5pt"><B>McLean and Fairfax, Virginia, March
30, 2012</B> &mdash; ATS Corporation (NYSE AMEX: ATSC), a leading information technology company that delivers innovative technology
solutions to government and commercial organizations, and Salient Federal Solutions, Inc. (Salient), a leading provider of information
technology, engineering, and intelligence analytic services to agencies in the intelligence, defense, homeland security, and cyber
domains, today announced that the tender offer by Atlas Merger Subsidiary, Inc. (&ldquo;Purchaser&rdquo;) for all of the outstanding
shares of common stock of ATSC at a price of $3.20 per share has expired.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 24.5pt">On February 21, 2012, ATSC
announced that it had entered into a definitive merger agreement with Salient. On February 28, 2012, Salient commenced a cash
tender offer to acquire ATSC&rsquo;s outstanding shares of common stock at $3.20 per share net to the seller in cash,
without interest and less any required withholding taxes. The tender offer expired at 11:59 p.m., New York City time, on
March 29, 2012, and Wells Fargo Bank, N.A., the depositary for the tender offer, has advised that, as of the expiration time,
22,552,686 shares of ATSC common stock (including approximately 215,861 shares subject to guarantees of delivery) had
been validly tendered and not properly withdrawn, representing approximately 97% of the outstanding shares of ATSC. All
of these shares have been accepted for payment by Purchaser.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 24.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 24.5pt">In accordance with the definitive
merger agreement, Salient is in the process of effecting a &ldquo;short-form&rdquo; merger under Delaware law, pursuant to
which Purchaser will merge with and into ATSC. The merger is expected to occur today. In the merger, each share of ATSC
common stock not previously purchased in the tender offer (other than any stockholders validly exercising their appraisal
rights under Delaware law) will be converted into the right to receive $3.20 per share net to the seller in cash, without
interest and less required withholding taxes. As a result of the completion of the merger, ATSC&rsquo;s common stock will
cease trading on the NYSE AMEX.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>About ATSC</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">ATSC is a leading provider of software and systems development,
systems integration, infrastructure management and outsourcing, information sharing, training and consulting to the Department
of Defense, federal civilian agencies, public safety and national security customers, as well as commercial enterprises. Headquartered
in McLean, Virginia, the Company has more than 400 employees.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Website: <U>www.atsc.com</U>.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>About Salient Federal Solutions</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Salient Federal Solutions is a leading provider of Federal IT
and engineering solutions that enable government and industry to respond quickly to new or surge mission requirements with exactly
the right people, skills, expertise, and technical solutions. The company works to accelerate mission impact by delivering highly
adaptable technology services, engineering solutions, and domain expertise that enable customers to rapidly meet the pressing requirements
of today, while anticipating tomorrow&rsquo;s evolving challenges. Salient Federal Solutions is headquartered in Fairfax, Va.,
with offices in Colorado Springs, Orlando, San Diego, and Tampa.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Website: www.salientfed.com</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Additional Information</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">This communication is neither an offer to purchase nor solicitation
of an offer to sell securities. A subsidiary of Salient has filed a tender offer statement on Schedule TO with the Securities and
Exchange Commission (the &ldquo;SEC&rdquo;), and ATSC has filed a solicitation/recommendation statement on Schedule 14D-9, with
respect to the offer. The tender offer statement (including an offer to purchase, a related letter of transmittal and other offer
documents) and the solicitation/recommendation statement contain important information that should be read carefully before any
decision is made with respect to the tender offer. Those materials have been made available to ATSC&rsquo;s stockholders at no
expense to them. In addition, all of those materials (and all other offer documents filed with the SEC) are available at no charge
on the SEC&rsquo;s website: www.sec.gov.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Forward-looking Statements</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">All statements in this press release that do not directly and
exclusively relate to historical facts constitute &ldquo;forward-looking statements&rdquo; within the meaning of that term in Section
27A of the United States Securities Act of 1933, as amended, and Section 21E of the United States Securities Exchange Act of 1934,
as amended. These statements and this information represent ATSC&rsquo;s intentions, plans, expectations and beliefs, and are subject
to risks, uncertainties and other factors, of which many are beyond the control of ATSC. These factors could cause actual results
to differ materially from such forward-looking statements or forward-looking information. These factors include but are not restricted
to: uncertainties as to the timing of the tender offer and the merger; uncertainties as to how many of ATSC&rsquo;s stockholders
will tender their shares in the offer; the risk that competing offers will be made; the possibility that various closing conditions
for the transaction may not be satisfied or waived, including regulatory clearance; ATSC&rsquo;s dependence on contracts with federal
government agencies for the majority of its revenue, ATSC&rsquo;s dependence on its GSA schedule contracts and its position as
a prime contractor on government-wide acquisition contracts to grow its business, and other factors discussed in ATSC&rsquo;s latest
annual report on Form 10-K filed with the Securities and Exchange Commission on February 17, 2011. The words &ldquo;believe,&rdquo;
&ldquo;estimate,&rdquo; &ldquo;expect,&rdquo; &ldquo;intend,&rdquo; &ldquo;anticipate,&rdquo; &ldquo;foresee,&rdquo; &ldquo;plan,&rdquo;
and similar expressions and variations thereof, identify certain of such forward-looking statements or forward-looking information,
which speak only as of the date on which they are made. ATSC disclaims any intention or obligation to publicly update or revise
any forward-looking statements or forward-looking information, whether as a result of new information, future events or otherwise,
except as required by applicable law. Readers are cautioned not to place undue reliance on these forward-looking statements or
on this forward-looking information.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">For more information:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Investors and financial media</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">For ATSC:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Joann O'Connell</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice President, Investor Relations</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">ATS Corporation</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">+1-571-766-2400</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tim May</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Chief Marketing Officer</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tim.May@SalientFed.com</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">703-891-8061</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>



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