Name of Project: Contract No: Contractor: Effective Date. Proposer shall have at least five (5) years of experience in the business of providing managed security services.Proposals should be in a sealed envelope labeled "Proposal for Security Services," Attention: Purchasing Officer. Consultant shall not subcontract any portion of the performance contemplated and provided for herein, other than to the subcontractors noted in the proposal,. Contra Costa County. INTERAGENCY AGREEMENT. Number. 23-551-4. The following is a list of some documents that may be recorded if they meet all requirements, and a description or definition of each document. All contracts are subject to funding availability. Contract may be cancelled in accordance with Contra Costa contract policy. Only the defendant can appeal.