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Job Title: Security & Law Enforcement (Master-at-Arms)
Category / Component: Enlisted • Active
Overview
Master-at-Arms (MA) Sailors provide the Navy’s core security, antiterrorism, and law enforcement capability, protecting people, installations, ships, and strategic assets at home and abroad. They conduct force protection, physical security, and policing on bases, aboard ships, at sea, and in expeditionary environments, and may specialize in areas such as military working dogs, harbor security, corrections, investigations, or protective services.
Key Responsibilities
Conduct antiterrorism and force protection patrols on installations and piers; stand sentry and access control posts and control entry to secure areas; perform vehicle, personnel, and baggage inspections to detect weapons, contraband, or unauthorized items; enforce traffic and parking regulations, respond to calls for service, and investigate incidents and traffic accidents; collect and preserve evidence and prepare reports and case files; provide law enforcement presence and crowd control during special events and emergencies; operate and maintain small arms, crew-served weapons, non-lethal weapons, and security vehicles or boats; support harbor and waterside security, high-value unit escorts, and expeditionary security missions; supervise and train junior security force personnel in watchstanding, weapons, and security procedures.
What to Expect
Work in a fast-paced, armed, and safety-critical environment where attention to detail, judgment, and professionalism are essential; frequent duty in rotating shifts, including nights, weekends, and holidays, to provide 24/7 security and law enforcement coverage; exposure to stressful situations involving emergencies, accidents, or criminal activity, requiring calm decision-making and strong communication; ongoing qualification and requalification in weapons, use of force, tactical skills, and physical fitness; increasing responsibility over time as you qualify for specialized billets such as patrol supervisor, watch commander, kennel master, or investigator.
Work Environment
Assignments at Navy installations in the U.S. and overseas, aboard aircraft carriers and other ships, and with expeditionary security units and strategic weapons facilities; work primarily on bases, piers, flight lines, harbor security boats, and in patrol vehicles, kennels, armories, and security operations centers; opportunities for overseas, forward-deployed, and dependent-restricted tours that count as sea duty for rotation; close integration with other security forces, Marine units, NCIS, and joint or host-nation partners depending on billet.
Pathways, Training & Advancement
Recruit Training followed by Master-at-Arms Class “A” School at Lackland AFB, where you learn basic law enforcement, weapons handling, antiterrorism, patrol procedures, and security operations; progressive on-the-job qualification through Personnel Qualification Standards, watchstations, and unit training; opportunities for advanced schools that award Navy Enlisted Classifications such as Military Working Dog Handler and Kennel Master, Harbor Security Coxswain and Patrol Leader, Corrections Specialist, Small Arms Instructor, Crew-Served Weapons Instructor, Protective Service Specialist, and Criminal Investigator; career-long development through leadership courses, warfare qualifications (such as ESWS, EAWS, EXW, FMF, or NWS when assigned to qualifying commands), and senior enlisted leader programs.
Enlist directly into the Master-at-Arms rating and attend MA “A” School after Recruit Training, then report to an operational security force billet at an installation, ship, or expeditionary unit; Reserve opportunities may exist in Navy Security Force and Maritime Expeditionary Security units for qualified prior-service or SELRES applicants, often requiring completion of MA “A” School or equivalent training and, for some billets, specific NECs or follow-on schools; prior-service Sailors from other ratings may be able to convert into MA based on community needs and screening.
Qualifications
All Navy jobs require meeting general enlistment or commissioning standards, which typically include:

• Eligibility to serve in the United States Navy, which may involve United States citizenship or other legal residency and work status, depending on the program and current law and policy
• A high school diploma or equivalent for enlisted positions, and a bachelor’s or qualifying professional degree for officer positions
  Meeting age limits that vary by program and are set in law and Navy policy. Some communities have more restrictive age ranges
• Meeting medical, vision, and dental standards, including body composition and physical fitness requirements, with some jobs requiring more demanding standards
• Meeting character and conduct standards, including background screening
• Achieving required test scores for your program, such as the Armed Services Vocational Aptitude Battery for enlisted roles or officer qualification tests for officer programs
• Eligibility for a security clearance when required for your rating or designator
• Additional qualifications can include specific skills, education, licensure, or experience that are unique to a job or community and will be reviewed with you by a recruiter.
  

Additional qualifications for this job may include:
United States citizenship or other status as allowed by current policy, with most billets requiring eligibility for a security clearance; strong moral character and clean legal history suitable for armed law enforcement duties; ability to meet Navy medical and physical fitness standards and to qualify with small arms and other weapons; comfort working in uniformed law enforcement and security roles, often carrying firearms and equipment for extended periods; willingness to work rotating shifts, deploy, and accept assignment to sea duty, overseas locations, and dependent-restricted tours when required.
Education
Education benefits are available through standard Navy programs such as Tuition Assistance, the Post-9/11 GI Bill, ACE-recommended college credit for Navy training, Navy COOL-funded certifications, USMAP apprenticeships, and other Navy College Program opportunities. Specific options depend on the Sailor’s status, training, and current Navy policy.
Pay, Benefits & Service
Pay, benefits, and service commitments follow standard Navy Active and/or Reserve policies for this type of role, including basic pay, allowances when eligible, health coverage, and retirement options. Exact entitlements, special pays, and service obligations depend on program, component, years of service, and current law and Navy guidance.
Incentives
Incentives such as bonuses, special pays, and loan repayment may be available at times for specific ratings or communities, but they change frequently and cannot be guaranteed. Applicants must confirm current incentives and eligibility with an official Navy recruiter or authoritative Navy source.
Notes and Disclaimers
This description is a general overview of typical duties, training, and opportunities in this community. It does not replace official Navy instructions, policies, or contracts and does not guarantee specific assignments, training, incentives, or outcomes. Actual opportunities depend on Navy needs, individual performance, screening results, and current law and policy.