<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>dex991.txt
<DESCRIPTION>EXHIBIT 99_1
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<PAGE>

                                                                    Exhibit 99.1

               Statement Under Oath of Principal Executive Officer
       Regarding Facts and Circumstances Relating to Exchange Act Filings

         I, Vance D. Coffman, state and attest that:

              (1)  To the best of my knowledge, based upon a review of the
              covered reports of Lockheed Martin Corporation ("Lockheed
              Martin"), and, except as corrected or supplemented in a subsequent
              covered report:

              .   no covered report contained an untrue statement of a material
                  fact as of the end of the period covered by such report (or in
                  the case of a report on Form 8-K or definitive proxy
                  materials, as of the date on which it was filed); and

              .   no covered report omitted to state a material fact necessary
                  to make the statements in the covered report, in light of the
                  circumstances under which they were made, not misleading as of
                  the end of the period covered by such report (or in the case
                  of a report on Form 8-K or definitive proxy materials, as of
                  the date on which it was filed).

         (2)  I have reviewed the contents of this statement with Lockheed
         Martin's Audit and Ethics Committee.

         (3)  In this statement under oath, each of the following, if filed on
         or before the date of this statement, is a "covered report":

              .   Annual Report on Form 10-K of Lockheed Martin for the fiscal
                  year ended December 31, 2001;

              .   all reports on Form 10-Q, all reports on Form 8-K and all
                  definitive proxy materials of Lockheed Martin filed with the
                  Commission subsequent to the filing of the Form 10-K
                  identified above; and

              .   any amendments to any of the foregoing.


/s/ Vance D. Coffman
------------------------------------
Vance D. Coffman
Chairman and Chief Executive Officer
August 8, 2002

                                                      Subscribed and sworn to
                                                       before me this 8th day of
                                                       August 2002.

                                                       /s/ Frances J. Frizzell
                                                       -------------------------
                                                       Notary Public

                                                       My Commission Expires:
                                                       July 5, 2005





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