The GEO Group, Inc. (GEO) 10-K 2017 FY Annual report

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form10-K of The GEO Group, Inc. (the “Company”) for the period ended December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, George C. Zoley, Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

/s/ George C. Zoley

George C. Zoley

Chief Executive Officer

Date: February 26, 2018