Name of Person Completing this Form. The proposal should be concise and to the point.A. Proposer shall have at least five (5) years of experience in the business of providing managed security services. Proposals must be submitted on Central Contra Costa Transit Authority's (County Connection) "Proposal. Largest childcare provider in Contra Costa County. First 5 Contra Costa, as the contracting agent for the county's implementation of Help. To add a new policy or procedure. To file an FBN in Contra Costa County follow these steps: 1. LOCP determinations in Contra Costa County.