EXHIBIT 99.3

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Quarterly Report of ANSYS, Inc. (the "Company") on
Form 10-Q for the quarter ended June 30, 2002 as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), I, Maria T. Shields,
Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that:

     (1)  The Report fully complies with requirements of section 13(a) or 15(d)
          of the Securities Exchange Act of 1934; and

     (2)  The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.

     /s/ Maria T. Shields
     -------------------------
     Maria T. Shields
     Chief Financial Officer
     August 12, 2002

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