An agency office can describe a need. That office is not automatically the buyer. In the FAR, a contracting officer is a person with authority to enter into, administer, and/or terminate contracts and to make related determinations and findings. The term includes certain authorized representatives acting inside the authority the contracting officer delegated.
Contracting officers may bind the Government only to the extent of the authority delegated to them. They must receive written instructions on those limits, and information about the limits must be readily available to the public and to agency personnel. No contract is entered into unless the contracting officer ensures that applicable law, executive orders, regulations, and required clearances have been met.
Contracting officers are responsible for effective contracting, for seeing that contract terms are followed, and for safeguarding the Government’s interests. They must ensure funds are available, treat contractors impartially, and may ask specialists for advice. They also designate a contracting officer’s representative (COR) in writing on many contracts. A COR is a Government employee unless agency rules allow otherwise, and a COR may not make commitments or changes that affect price, quality, quantity, delivery, or other contract terms.