Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER
AND CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Each of the undersigned hereby certifies, in his capacity as an officer of Towers Watson & Co. (the “Company”), for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of his knowledge:

• The Annual Report of the Company on Form 10-K for the period ended June 30, 2011, fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

• The information contained in such report fairly presents, in all material respects, the financial condition and results of operation of the Company.

Date: August 24, 2011

/s/ John J. Haley  

John J. Haley 

Chief Executive Officer 

/s/ Roger F. Millay  

Roger F. Millay 

Chief Financial Officer 

A signed original of this written statement required by Section 906 has been provided to Towers Watson & Co. and will be retained by Towers Watson & Co. and furnished to the Securities and Exchange Commission or its staff upon request.