Ohio Public Employees Retirement System, Columbus, issued an RFP for a third-party administrator for its $226 million 401(a) plan, according to its website. CitiStreet, the plans current administrator, will be invited to rebid. The RFP is available at www.opers.org/pdf/vendor/dc-plan-services.pdf#zoom=100. Proposals are due March 6 and a decision is expected by May 21. Eric Sanderson, manager of defined contribution, did not return calls by press time.