FMC 10-Q 2008 Q2 Quarterly report

Exhibit 32.2

Certification

of

Chief Financial Officer

Pursuant to 18 U.S.C. 1350

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

I, William H. Schumann, III, Executive Vice President and Chief Financial Officer of FMC Technologies, Inc. (the “Company”), do hereby certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(a) the Quarterly Report on Form 10-Q of the Company for the fiscal quarter ended June 30, 2008, as filed with the Securities and Exchange Commission (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

Date: August 6, 2008

/s/ William H. Schumann, III

William H. Schumann, III

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)