Power of Attorney
Know all by these presents, that the undersigned hereby constitutes and appoints
each of Hayward D. Fisk, William L. Deckelman, Stephen E. Johnson, Kismet
Woodring Goodman and the Secretary of the Corporation and any Assistant
Secretary of the Corporation, signing singly, the undersigneds true and
lawful attorney-in-fact to:

     (1) prepare, execute in the undersigneds name and on the undersigneds
behalf, and submit to the U.S. Securities and Exchange Commission (the SEC) a
 Form ID, including amendments thereto, and any other documents necessary or
appropriate to obtain codes and passwords enabling the undersigned to make
electronic filings with the SEC of reports required by Section 16(a) of the
Securities Exchange Act of 1934 or any rule or regulation of the SEC;

        (2) execute for and on behalf of the undersigned, in the undersigneds
capacity as an officer and/or director of Computer Sciences Corporation (the
"Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules thereunder, and any other
forms or reports the undersigned may be required to file in connection with
the undersigneds ownership, acquisition, or disposition of securities of the
Company;

     (3) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Form
3, 4, or 5, or other form or report, and timely file such form or report with
the United States Securities and Exchange Commission and any stock exchange
or similar authority; and

     (4) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall be in such form
and shall contain such terms and conditions as such attorney-in fact may
approve in such attorney-in-facts discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do or cause
to be done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigneds responsibilities to
comply with Section 16 of the Securities Exchange Act of 1934.


This Power of attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to
the undersigneds holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 18th day of March, 2008.

                                      /s/NATHAN SIEKIERKA