What is a contracting officer (CO)?

A Contracting Officer (CO) has legal authority delegated from the head of the contracting activity to sign contracts, issue modifications, and take contractual actions on behalf of the government. Program managers, technical evaluators, and end users at the agency do NOT have this authority — only the CO does.

CO warrant levels: COs are certified at different dollar-limit warrant levels (FAC-C Level I, II, or III), and their authority is limited to contracts within their warrant. A CO with a $50K warrant cannot legally bind the government to a $500K contract — that requires a CO with a higher-level warrant. This matters because informal agreements from a program manager or lower-level staff don't create government obligations.

Types of contracting officers: - Procuring Contracting Officer (PCO): the CO who awards the contract - Administrative Contracting Officer (ACO): manages the contract post-award — modifications, invoice approvals, deliverable acceptance - Termination Contracting Officer (TCO): handles contract termination if it occurs - On complex contracts, all three roles may be filled by different people; on simpler contracts, one CO handles all three phases

Other key agency roles that vendors interact with: - Contracting Officer's Representative (COR): technical monitor delegated by the CO for day-to-day contract oversight. CORs can direct contractor work within the contract scope but CANNOT modify the contract or add new work. Requests from CORs to expand scope must be formalized through a CO modification. - Program Manager (PM): agency official responsible for the program the contract supports. PMs often lead technical evaluations and drive requirements development but have no contracting authority. - Small Business Specialist: agency official responsible for maximizing small-business utilization. Great early-relationship contact — small business specialists often know about upcoming procurements before formal announcement. - Contract Specialist: junior contracting professional working under a CO. Sometimes drafts solicitations and manages routine correspondence but cannot sign contract actions.

Practical implications: - If someone at the agency verbally agrees to expand your scope, do NOT proceed with the extra work until you have a signed contract modification from the CO. Costs incurred without CO authorization may not be reimbursable. - Direct correspondence with the CO on modification requests, invoicing questions, or contract disputes. Copy the COR for visibility but understand the CO makes the decisions. - Building relationships with CORs and program managers is valuable for winning follow-on work — but for CONTRACTUAL matters, always work through the CO.