A draft request for proposal will be ready this summer and GSA is planning on releasing a final RFP this winter, said program manager Jim Ghiloni.
Contract awards will be announced in summer 2013 and work is expected to start in fall the same year, according to the report.
GSA will not issue a formal RFI for the professional services contract but instead will seek feedback via social media and internet platforms, Ghiloni said.
The agency has not yet decided whether it will award one contract or two separate contracts, but it will make commercial and non-commercial items available via task orders.
OASIS will allow agencies to purchase financial advice, logistics, management and other professional engineering services.