Vendors and suppliers interested in doing business with Allegheny County can review open solicitations for Purchasing and Supplies bids on the Bonfire website. Agreement: A contract negotiated between Allegheny County and the Successful Proposer to provide the Contract Services.Request for Proposals. Responsive Website and CMS for Allegany County, MD Economic Development. Construction contractors interested in performing construction contracts with the department must first complete the Vendor Registration process. Com under "Business Opportunities". Requests for Proposal, Requests for Qualifications, Invitations to Bid. The URA is involved in hundreds of projects throughout the City of Pittsburgh. All prospective bidders are required to execute the Bid Schedule, Bid Bond, Proposal, Non.