San Francisco City & County Employees Retirement System may issue an RFP for a real estate consultant to oversee its $849 million in real estate investments. The board of the $10.8 billion pension fund will meet March 5 to vote on the proposal. Incumbent consultant Townsend Group will be invited to rebid on the contract, which is expected to run four years, said Clare Murphy, executive director. If approved, the RFP would be issued shortly, with final proposals due April 16. Finalist presentations are slated for the boards June 4 meeting.