Registration No. 33-55117 ================================================================================ SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ---------------------------- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ---------------------------- BARRETT BUSINESS SERVICES, INC. (Exact name of registrant as specified in its charter) Maryland 52-0812977 (State or other jurisdiction of (IRS Employer Identification No.) incorporation or organization) 4724 S.W. Macadam Avenue Portland, Oregon 97239 Telephone (503) 220-0988 (Address and telephone number of principal executive offices) BARRETT BUSINESS SERVICES, INC., 1993 STOCK INCENTIVE PLAN (Full title of the plan) William W. Sherertz President Barrett Business Services, Inc. 4724 S.W. Macadam Avenue Portland, Oregon 97239 Telephone (503) 220-0988 (Name, address, and telephone number of agent for service) ---------------------------- Copies to: Miller Nash LLP 111 S.W. Fifth Avenue Portland, Oregon 97204-3699 Attn: Mary Ann Frantz (503) 224-5858 ---------------------------- DEREGISTRATION -------------- Pursuant to Registration Statement on Form S-8 (No. 33-55117) first filed with the Securities and Exchange Commission on August 17, 1994, Barrett Business Services, Inc., a Maryland corporation, registered 300,000 shares of common stock, $0.01 par value per share, for issuance under the Barrett Business Services, Inc., 1993 Stock Incentive Plan. Of the 300,000 shares originally registered, 178,243 shares had been issued and sold as of May 12, 2005. The Registration Statement is hereby amended to deregister 121,757 shares of common stock, $0.01 par value per share, of Barrett Business Services, Inc., and to terminate the registration. SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this post-effective amendment to registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of Portland, state of Oregon, on the 12th day of May, 2005. BARRETT BUSINESS SERVICES, INC. (Registrant) By /s/ Michael D. Mulholland ------------------------------------- Michael D. Mulholland Vice President-Finance and Secretary Pursuant to the requirements of the Securities Act of 1933, this post-effective amendment to registration statement has been signed by the following persons in the capacities indicated as of the 12th day of May, 2005. Signature Title --------- ----- (1) Principal Executive Officer and Director: /s/ William W. Sherertz President and Chief Executive Officer --------------------------------- and Director William W. Sherertz (2) Principal Financial Officer: /s/ Michael D. Mulholland Vice President-Finance and Secretary --------------------------------- Michael D. Mulholland (3) Principal Accounting Officer: /s/ James D. Miller --------------------------------- James D. Miller Controller and Assistant Secretary (4) A majority of the Board of Directors: /s/ Thomas J. Carley --------------------------------- Thomas J. Carley Director /s/ James B. Hicks --------------------------------- James B. Hicks Director II-1 /s/ Jon L. Justesen --------------------------------- Jon L. Justesen Director /s/ Anthony Meeker --------------------------------- Anthony Meeker Director --------------------------------- Nancy B. Sherertz Director II-2