Pima County open and closed solicitations are posted here. Find exclusive open government bids opportunities and RFPs.Pima County Community College District ("College") is seeking proposals from qualified firms to provide Chartered Ground Transportation Services. It is the responsibility of the Offeror to submit complete and compliant proposals. How do I prepare to submit my bid or proposal to Pima County? What if I have questions? Call 800-835-4603, option 2 for help with BidNet registration. The process usually requires about 90-110 days to complete (from publication of solicitation to final Contract or Purchase order). Requests for Proposals (RFP). Before completing and submitting a Proposal, each firm shall familiarize itself with the entire RFP, including the Scope of.