Click here to learn how to design a service contract using our Centered Customer Market Discovery methodology. About Middlesex Consulting.The Contract Documents form the entire agreement between Owner and. Design-Builder. AIA Document C403â„¢-2021 is a standard form agreement where a client can hire a consultant to perform design assist services for a project. Middlesex (collectively referred to as the Project Partners) invite qualified firms to submit a Scope of Work and Cost Proposal to complete final designs. The Contract Agreement in the form contained in the Bid Documents, b. The Bond Cover Sheet, Performance Bond and Payment Bond in the form contained in the Bid. How to use the contract template. A design consultant agreement is a contract that defines the working relationship between an independent design consultant and their client. The default view for the solicitation table includes "Open" solicitations that are accepting bid responses.