EXHIBIT 99.1

                             OFFICER CERTIFICATIONS


     Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned,
being the duly elected and appointed chief executive officer and chief financial
officer of MPSI Systems Inc., a Delaware corporation (the "Company"), subject in
all respects to the principle of "materiality" that is inherent in financial
reporting under generally accepted accounting principles, and subject further to
knowledge actually in their possession at the date of this Certificate, hereby
certify that:

     1. the Company's annual report on Form 10-K as amended for the year ended
December 31, 2002, complies with the requirements of section 13(a) or 15(d) of
the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d));

     2. the financial statements, including notes thereto and supplemental
information contained in various parts of such periodic report, fairly present,
in all material respects when considered in the context of the financial
statements taken as a whole, the financial condition, results of operations and
changes in cash flow of the Company for the indicated periods;


     Executed this 29th day of April, 2003.



                                        /s/ Ronald G. Harper
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                                 Ronald G. Harper, Chief Executive Officer

                                        /s/  James C. Auten
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                                 James C. Auten, Chief Financial Officer