Kratos Defense & Security Solutions (KTOS) 10-Q 2005 Q2 Quarterly report

EXHIBIT 32.1

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

In connection with the accompanying Quarterly Report of Wireless Facilities, Inc. (the “Company”) on Form 10-Q for the quarter ended July 1, 2005 (the “Report”), I, Eric M. DeMarco, Chief Executive 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 the requirements of Section 13(a) 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.

Date: August 10, 2005
Wireless Facilities, Inc.
By:	/s/ Eric M. DeMarco.
	Eric M. DeMarco
	Chief Executive Officer