Security & Law Enforcement (Master-at-Arms)

About the Role

Master-at-Arms (MA) Sailors serve as the Navy's core security, antiterrorism, and law enforcement capability. They are responsible for protecting people, installations, ships, and strategic assets both at home and abroad. This role involves conducting force protection, physical security, and policing across diverse environments, including bases, aboard ships, at sea, and in expeditionary settings. MAs may also specialize in critical areas such as military working dogs, harbor security, corrections, investigations, or protective services.

What to Expect

You will work in a fast-paced, armed, and safety-critical environment where attention to detail, sound judgment, and professionalism are essential. The role demands frequent duty in rotating shifts, including nights, weekends, and holidays, to ensure 24/7 security coverage. You will face stressful situations involving emergencies, accidents, or criminal activity, requiring calm decision-making and strong communication skills. As you progress, you will undergo ongoing qualification and requalification in weapons, use of force, tactical skills, and physical fitness. Responsibility increases over time as you qualify for specialized billets such as patrol supervisor, watch commander, kennel master, or investigator.

Work Environment

Assignments take place at Navy installations in the U.S. and overseas, aboard aircraft carriers and other ships, and with expeditionary security units and strategic weapons facilities. Your daily work will primarily occur on bases, piers, flight lines, harbor security boats, and in patrol vehicles, kennels, armories, and security operations centers. The role offers opportunities for overseas, forward-deployed, and dependent-restricted tours that count as sea duty for rotation. You will work in close integration with other security forces, Marine units, NCIS, and joint or host-nation partners, depending on your specific billet.

Pathways, Training & Advancement

The journey begins with Recruit Training followed by Master-at-Arms Class "A" School at Lackland AFB, where you will learn basic law enforcement, weapons handling, antiterrorism, patrol procedures, and security operations. You will then report to an operational security force billet at an installation, ship, or expeditionary unit. Career development is driven by progressive on-the-job qualification through Personnel Qualification Standards, watchstations, and unit training. Opportunities exist for advanced schools awarding Navy Enlisted Classifications such as Military Working Dog Handler, Harbor Security Coxswain, Corrections Specialist, and Criminal Investigator. Career-long development includes leadership courses, warfare qualifications, and senior enlisted leader programs.

Application & Eligibility

To join the Master-at-Arms community, you must meet general enlistment standards, including U.S. citizenship or legal residency, a high school diploma, and specific age, medical, vision, and dental standards. A clean legal history and strong moral character are required for armed law enforcement duties. You must be eligible for a security clearance and capable of meeting the physical fitness standards required to qualify with small arms. Prior-service Sailors from other ratings may be able to convert into MA based on community needs and screening. Reserve opportunities may also exist for qualified applicants.

Equal Opportunity

The U.S. Navy is an equal opportunity employer. We consider qualified applicants regardless of race, color, religion, sex, national origin, age, marital status, parental status, sexual orientation, gender identity, genetic information, disability, or protected veteran status.