in a contract, responsibilities and obligations are outlined and agreed upon by the two parties involved.â  engineering contracts cover four particular issues of an agreement between an engineer and the company they are going to work on a project for.â  the first purpose of the contract is that it clearly lays out what is expected of the contracted engineer. to be completely clear, the company proposing the work should outline each task that is part of the project and provide deadlines. any parts of the project that should not be handled by the contracted engineer should be clearly stated in the contract.â  engineering contracts should give the expected time frame for the project and a deadline for total completion. an engineering contract should outline when payments will be received, from whom, and how much, as well as instructions for invoicing. if this is the case, the contract should lay out these milestones and payment amounts.