Washington State Investment Board, Olympia, is searching for a provider of proxy voting services to establish a strategic alliance or partnership, according to an RFP posted on the $82 billion systems website. The services initially will be used only for domestic equities but could be expanded as the scope of corporate governance matures. The board hopes to have a contract in place by Jan. 1. In 2004, the fund hired Glass Lewis to help it move toward voting its U.S. equity proxies in-house. Board spokeswoman Liz Mendizabal was not available for comment; Glass Lewis spokeswoman Bayley Diamond said she couldnt comment.