The Office of Procurement Services (OPS) is the central procurement office for FCPS. The mission of OPS is to show good stewardship of taxpayer dollars.To view AEPA contracts, copy the contract number and search using the Fairfax County Contract Register . First, you will need to contact the Zoning Department and fill out a Use Permit Application. Provide a comprehensive competitively solicitated and awarded Master Agreement offering. OPS will carry out its purchasing and supply management activities in accordance with the VPPA, the Fairfax. General liability business insurance is required for full and half season vendors. It is recommended for occasional vendors.