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Army MOS · Support

31Z Senior Military Police Sergeant

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Senior Military Police Sergeant supervises manning, training, equipping, and combat readiness at battalion or brigade level. The sergeant plans and manages operations supporting policing, corrections and detention, security and mobility, and criminal investigations while advising commanders on policing, resource security, and enlisted matters.

Minimum clearance: Top Secret

Minimum ASVAB: ST 91

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-18

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: smartbook-611-21-ch10c-fy2025 (source date 2025-12). Policy applicability has not been established.

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Core Skills

  • Battalion and brigade readiness coordination
  • Detention and mobility support planning
  • Critical installation resource protection advising
  • Law enforcement policy development and implementation

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

First-Line Supervisors of Police and Detectives

Planning police operations, coordinating criminal-investigation tasking, and implementing law enforcement policies transfer directly to police supervisory work.

How to prepare: Request a target agency's assessment of your military police record against its civilian officer certification and supervisory-entry standards before pursuing a supervisor opening.

What the civilian work involves
  • Supervise and coordinate the investigation of criminal cases, offering guidance and expertise to investigators, and ensuring that procedures are conducted in accordance with laws and regulations.
  • Prepare work schedules and assign duties to subordinates.
  • Explain police operations to subordinates to assist them in performing their job duties.
Civilian tools and software (examples)
  • Microsoft Excel
  • Microsoft Word

First-Line Supervisors of Security Workers

Coordinating security operations, supervising staffing and training, and advising on protection of critical installation resources align with site-security supervision.

How to prepare: Build a sample site-security staffing plan linking shift assignments, access control, and incident reporting. For posts that include guard duties, most states require guard licensing with training and background checks; armed guards usually require government weapons licensing and face stricter entry screening.

What the civilian work involves
  • Investigate disturbances on the premises, such as security alarms, altercations, and suspicious activity.
  • Patrol the premises to prevent or detect intrusion, protect property, or preserve order.
  • Monitor and authorize entry of employees, visitors, or other persons.
Civilian tools and software (examples)
  • Employee scheduling software
  • Microsoft Excel

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Career Growth

  • Physical Security Professional (PSP) · Funded · Promotion points

    Document physical-security expertise relevant to supervising site protection.

    Eligibility and preparation: Five years of physical security experience without a higher education degree, or four with an APP; four years with an accredited bachelor's degree or international equivalent, or three with an APP; or three years with an accredited master's degree or international equivalent. Qualifying experience means personal engagement in security or loss prevention full time or as a primary duty.

    For: First-Line Supervisors of Security Workers

  • Certified Protection Professional (CPP) · Funded · Promotion points

    Validate security-management knowledge for broader responsibility within security supervision.

    Eligibility and preparation: Seven years of security experience without a higher education degree, six with a bachelor's degree, or five with a master's degree; an APP reduces each threshold by one year. Every route requires at least three years in responsible charge of a security function, meaning independent authority over operational methods and execution, generally excluding patrol-officer-equivalent work. Prior full-time security employment is required, but current employment is not; applicants must have no felony conviction that would reflect negatively on the profession.

    For: First-Line Supervisors of Security Workers

Notes & Sources

Evidence for this guidance (7 documents)
  1. Army COOL MOC feed: 31Z Senior Military Police Sergeant

    [1] data/authority/army-codes.json entry 31Z (OSD COOL feed, fetched 2026-07-25); DB rank enlisted, authority codeType enlisted

    Supports: Battalion and brigade readiness coordination, Detention and mobility support planning, Critical installation resource protection advising, Law enforcement policy development and implementation, First-Line Supervisors of Police and Detectives (O*NET 33-1012.00), First-Line Supervisors of Security Workers (O*NET 33-1091.00)

  2. O*NET: First-Line Supervisors of Police and Detectives

    [2] O*NET 30.3 occupational data

    Supports: First-Line Supervisors of Police and Detectives (O*NET 33-1012.00)

  3. O*NET: First-Line Supervisors of Security Workers

    [3] O*NET 30.3 occupational data

    Supports: First-Line Supervisors of Security Workers (O*NET 33-1091.00)

  4. Bureau of Labor Statistics: Security Guards and Gambling Surveillance Officers

    [4] How to Become One; Licenses, Certifications, and Registrations; page dated 2026-08-27, retrieved 2026-09-23

    Supports: First-Line Supervisors of Security Workers (O*NET 33-1091.00)

  5. COOL credential mapping: Physical Security Professional (PSP)

    [5] 31Z cached COOL credential feed

    Supports: Physical Security Professional (PSP)

  6. ASIS International Board Certification Handbook, updated 4 August 2026

    [6] Page 30, PSP Eligibility Requirements; page 8, experience definition

    Supports: Physical Security Professional (PSP)

    [8] Page 18, CPP Eligibility Requirements and CPP Body of Knowledge; page 8, Eligibility Requirements for All Applicants; retrieved 2026-09-23

    Supports: Certified Protection Professional (CPP)

  7. COOL credential mapping: Certified Protection Professional (CPP)

    [7] 31Z cached COOL credential feed

    Supports: Certified Protection Professional (CPP)

Defense contractor jobs for 31Z

Predecessor codes

Historical codes with documented links to 31Z. Each history page explains the change.

29ZElectronics Maintenance Chief29Z5Elect Maintenance Chief31B6Military Police31D6CID Special Agent31E6Internment/Resettlement Specialist31K6Military Working Dog (MWD) Handler72HCentral Office Operations

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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