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. Development Services provides the City Council and community with creative guidance and effective implementation of land use development. Request for Proposal number: P20AM004. Maricopa County, at its sole discretion, may require the Job Order Contractor to purchase from a specified or designated County supplier (i.e. The City of Maricopa uses the Caselle Financial Management System, current version 2.12. For design-build construction services and job-order-contracting construction services, the Request for Proposals shall include: 1. Construction Management Services for Pima Road Redevelopment and Expansion, Scottsdale. Scope: Construction management services for redevelopment and expansion.