Exhibit 32.1

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 Innovative Solutions and Support, Inc. (the “Company”) on Form 10-Q for the period ending June 30, 2004 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley Act of 2002, that:

 (1) The Report fully complies with the 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 result of operations of the Company.

/s/    GEOFFREY S. M. HEDRICK 

Geoffrey S. M. Hedrick
Chairman of the Board and Chief Executive Officer

August 11, 2004

/s/    JAMES J. REILLY    

James J. Reilly
Chief Financial Officer

August 11, 2004