Certification of Chief Executive Officer pursuant to Section 906

EX-32.1 4 dex321.htm CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 906 Certification of Chief Executive Officer pursuant to Section 906

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 Of THE SARBANES-OXLEY ACT OF 2002

I, Steven E. Zuccarini, Chief Executive Officer of InnerWorkings, Inc. (the “Company”), hereby certify, that:

(1) The Company’s quarterly report on Form 10-Q for the quarterly period ended June 30, 2008 (the “Form 10-Q”) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934, as amended; and

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

/s/ Steven E. Zuccarini

Steven E. Zuccarini

Chief Executive Officer

August 11, 2008