Exhibit 32.2

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 Kforce Inc. (the “Firm”) on Form 10-Q for the quarterly period ended September 30, 2004 as filed with the Securities and Exchange Commission on the date hereof (the “Form 10-Q”), I, Joseph J. Liberatore, Chief Financial Officer of the Firm, hereby 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 Form 10-Q fully 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)); and

2) The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Firm.

Date: November 5, 2004

/s/ Joseph J. Liberatore

Joseph J. Liberatore,

Senior Vice President

Chief Financial Officer

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