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 accepting 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 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 15th 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