Contracting Officer (CO/KO)

Full Definition

A Contracting Officer (CO), sometimes abbreviated KO, is the only government official with the legal authority to enter into, administer, modify, and terminate contracts on behalf of the United States government. This authority is granted through a warrant, which specifies dollar thresholds and types of actions the CO can execute. Contracting officers are governed by FAR Part 1.602, which establishes their responsibilities including ensuring compliance with all applicable laws and regulations, safeguarding the interests of the government, and maintaining proper contract files. Only the contracting officer can bind the government — verbal or written directions from program managers, end users, CORs, or any other government personnel do not constitute contractual authority. COs are typically assigned to a specific contracting office within an agency and may manage dozens of active contracts simultaneously. They are supported by contract specialists who handle administrative tasks.

Why It Matters

Building a professional relationship with contracting officers is important, but all formal communications about contract scope, funding, schedule, and terms must go through the CO. If a program manager or COR asks you to perform work outside the contract scope, politely request that they coordinate a formal modification through the contracting officer before you begin — performing unauthorized work puts your company at financial risk since the government is not obligated to pay for it. During the pre-award phase, communication rules are strict: only contact the CO or designated point of contact listed in the solicitation to avoid organizational conflicts of interest or procurement integrity violations. After award, establish regular communication cadences with the CO for contract administration issues. Understanding the CO's priorities — compliance, cost control, and timely performance — will help you frame requests effectively.

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