St. Louis Public School Retirement System, with $600 million in assets, is seeking an investment consultant, said Albert O'Brien, investment counselor. RFPs are due Nov. 8. The consultant will be responsible for determining whether asset allocation changes will be needed and new managers will be hired, said Jim Reddout, executive director. The fund uses DeMarche Associates for performance monitoring only; DeMarche won't be seeking the added responsibilities. A shortlist is expected in mid-December, with a selection in late January.