EXHIBIT 32

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350


In connection  with the Annual Report of Barrett  Business  Services,  Inc. (the
"Company")  on Form 10-K for the year ended  December 31, 2004 as filed with the
Securities  and  Exchange  Commission  on the date  hereof (the  "Report"),  the
undersigned certify, pursuant to 18 U.S.C. ss. 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/ William W. Sherertz                        /s/ Michael D. Mulholland
--------------------------                     ------------------------------
William W. Sherertz                            Michael D. Mulholland
Chief Executive Officer                         Chief Financial Officer
March 30, 2005                                 March 30, 2005