How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document.Below are links to solicitations available through Maricopa County. The bid or Request for Proposal will be designed to be competitively bid following all MCCCD Purchasing guidelines and allowing maximum competition. Specified in the Contract Documents, complete and ready for final payment,. ENGINEER will make a corresponding final inspection with OWNER and. Find RFP searches and finds website design bids, contracts, and request for proposals.