Exhibit 23.01

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements (No. 333-272643, No. 333-239337, No. 333-225436, No. 333-181712, No. 333-147476, No. 333-130143, No. 333-82424, No. 333-58118, No. 333-32544, and No. 333-73443) on Form S-8 of Heidrick & Struggles International, Inc. of our reports dated March 4, 2024, relating to the consolidated financial statements and the effectiveness of internal control over financial reporting of Heidrick & Struggles International, Inc., appearing in this Annual Report on Form 10-K of Heidrick & Struggles International, Inc. for the year ended December 31, 2023.

/s/ RSM US LLP

Chicago, Illinois

March 4, 2024