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. Their mission is to protect people, installations, ships, and strategic assets both at home and abroad. These professionals conduct force protection, physical security, and policing across diverse environments, including bases, aboard ships, at sea, and in expeditionary settings. The role offers the opportunity to 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. The career path involves ongoing qualification and requalification in weapons, use of force, tactical skills, and physical fitness. As you progress, you will take on increasing responsibility, qualifying for specialized billets such as patrol supervisor, watch commander, kennel master, or investigator.

Work Environment

Assignments vary widely, ranging from Navy installations in the U.S. and overseas to aircraft carriers, other ships, and expeditionary security units. You will work primarily 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.

Training & Advancement

Your 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. Advancement is driven by progressive on-the-job qualification through Personnel Qualification Standards, watchstations, and unit training. The Navy offers opportunities for advanced schools that award specific Navy Enlisted Classifications, such as Military Working Dog Handler, Harbor Security Coxswain, Corrections Specialist, and Criminal Investigator. Career-long development is supported through leadership courses, warfare qualifications (such as ESWS, EAWS, EXW, FMF, or NWS), and senior enlisted leader programs.

How to Apply

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 eligibility for a security clearance. You must also meet medical, vision, dental, and physical fitness standards, as well as character and conduct requirements. Prior-service Sailors from other ratings may be able to convert into MA based on community needs and screening. For specific details on Reserve opportunities, incentives, and current eligibility, please contact an official Navy recruiter or consult authoritative Navy sources.