Procurement solicitation information for Materials and Services and Design and Construction using the Vendor Self-Service Portal. Browse Bid Opportunities.In the spirit of continuous improvement and cost management, Pima County utilizes this bid system to post Request for Proposal (RFP) and bid opportunities. These links will connect you with the latest transportation-related bid and procurement opportunities from ADOT and a variety of state and local agencies. Pima County Community College District ("College") is seeking proposals from qualified firms for a Smart. The Procurement Department strives to maximize the benefits that Pima County citizens receive from the expenditure of public funds on goods and services. "Bidder" means a person who desires to make a proposal on procurement. (See "Qualified Bidder" and "Responsive Bidder"). 2.