There may be no difference, it depends on how the job description is written. Primarily, an administrator does most of their work before the contract is signed while a manager does most of their work on existing contracts.1.1: Purpose of the Contract Manager Reference Guide. Unlike general contractors, construction management services contract with the owner for a fixed fee. I think being a contract specialist is an underrated job. It's simple and easy enough, but pays decently and has plenty of job availability. There is a very relevant question about ownership of the entire demand and supply cycle. They're the maestro of this juggling act. From creating to negotiating, executing, and renewing contracts, these folks keep businesses afloat. The role of the contract manager is shifting to a highly digital one.