Contracting expert Tim Sullivan says vendors that want to have good relationships with the agencies they do business with must remember one thing. Nothing happens in government contracting unless the contracting officer says it does.
How the Contracting Officer (CO) interacts with the government contractor is critical to the failure or success of the contract. This well written article spells out the details involved in working with the CO and the others that may try to influence the work, although not authorized to. A must read.