Security & Law Enforcement (Master-at-Arms)

About the Role

Master-at-Arms (MA) Sailors form the backbone of the Navy's security, antiterrorism, and law enforcement capabilities. Their mission is to protect people, installations, ships, and strategic assets both at home and abroad. Operating in a fast-paced, armed, and safety-critical environment, MAs provide force protection, physical security, and policing across diverse settings including bases, piers, ships at sea, and expeditionary environments.

This role is designed for individuals who thrive under pressure and possess the judgment to handle emergencies, accidents, and criminal activity with calm professionalism. The position offers a dynamic career path where responsibility increases over time, allowing Sailors to specialize in areas such as military working dogs, harbor security, corrections, investigations, or protective services.

Work Environment

Assignments vary widely, ranging from Navy installations in the U.S. and overseas to aircraft carriers and strategic weapons facilities. MAs work primarily on bases, piers, flight lines, and in patrol vehicles, kennels, armories, and security operations centers. The role often involves close integration with other security forces, Marine units, NCIS, and joint or host-nation partners.

Sailors should expect frequent duty in rotating shifts, including nights, weekends, and holidays, to ensure 24/7 coverage. Opportunities for overseas, forward-deployed, and dependent-restricted tours are common, counting as sea duty for rotation purposes.

Training & Career Path

The journey begins with Recruit Training followed by Master-at-Arms Class "A" School at Lackland AFB, where foundational skills in law enforcement, weapons handling, antiterrorism, and security operations are taught. Career development is progressive, driven by on-the-job qualification through Personnel Qualification Standards and unit training.

Advanced opportunities allow Sailors to earn Navy Enlisted Classifications (NECs) for specialized roles such as Military Working Dog Handler, Harbor Security Coxswain, Corrections Specialist, and Criminal Investigator. Career-long growth is supported by leadership courses, warfare qualifications (such as ESWS, EAWS, EXW, FMF, or NWS), and senior enlisted leader programs.

Reserve opportunities may exist for qualified prior-service or SELRES applicants, often requiring completion of MA "A" School or equivalent training. Prior-service Sailors from other ratings may also be eligible to convert into the MA community based on specific needs and screening.

Equal Opportunity

The U.S. Navy is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

Application Instructions

This description outlines typical duties and opportunities within the Master-at-Arms community. It does not replace official Navy instructions, policies, or contracts. Actual assignments, training, and incentives depend on Navy needs, individual performance, and current law and policy. For specific details regarding enlistment standards, security clearance eligibility, and current incentives, please contact an official Navy recruiter.