Exhibit 32.1

CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), the undersigned officer of Heidrick & Struggles International, Inc., a Delaware corporation (the “Company”), does hereby certify that:

The Annual Report on Form 10-K for the year ended December 31, 2017 (the “Form 10-K”) of the Company fully complies with the requirements of section 13 (a) or 15 (d) of the Securities Exchange Act of 1934 and the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: March 13, 2018	/s/ Krishnan Rajagopalan
	Krishnan Rajagopalan
	Chief Executive Officer