Barrett Business Services (BBSI) 10-Q 2023 Q3 Quarterly report

EXHIBIT 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

In connection with the Quarterly Report of Barrett Business Services, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned certify, pursuant to 18 U.S.C. § 1350, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; 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/ Gary E. Kramer	/s/ Anthony J. Harris
Gary E. Kramer	Anthony J. Harris
Chief Executive Officer	Chief Financial Officer
November 1, 2023	November 1, 2023

A signed original of this written statement required by Section 906 has been provided to Barrett Business Services, Inc. and will be retained by Barrett Business Services, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.