EX-32.1 5 ttec-20250630xex32d1.htm EX-32.1

Exhibit 32.1

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CERTIFICATION OF CHIEF EXECUTIVE OFFICER

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PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

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The undersigned, the Chief Executive Officer of TTEC Holdings, Inc. (the “Company”), hereby certifies that, to his knowledge on the date hereof:

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| (a) | the Form 10-Q of the Company for the quarter ended June 30, 2025 filed on the date hereof with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and

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

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​ | By: | /s/ KENNETH D. TUCHMAN
​ | ​ | Kenneth D. Tuchman
​ | ​ | Chairman and Chief Executive Officer

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Date: August 7, 2025