Army MOS · Engineering

881A Marine Engineering Officer

Current service use not established

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

Overview

A Marine Engineering Officer supervises the operation, maintenance, repair, and overhaul of marine power plants, propulsion systems, heating and ventilation systems, and other ship and port equipment. The officer inspects ship machinery, monitors marine repair contracts, supervises the loading of fuel, water, and ballast, and prepares maintenance records and reports.

Minimum clearance: Secret

Core Skills

  • Marine repair and overhaul contract oversight
  • Fuel, water, and ballast loading supervision
  • Shipboard machinery inspection and repair documentation
  • Propulsion and auxiliary systems maintenance oversight

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.

Ship Engineers

Supervising marine power plants, propulsion systems, machinery inspections, and overhauls transfers directly to shipboard engineering operations.

How to prepare: Compile sea-service and training records, then use National Maritime Center requirements to identify the appropriate USCG engine endorsement and any remaining approved training or sea time. Entry typically requires several years of maritime experience, a TSA Transportation Worker Identification Credential, and a USCG Merchant Mariner Credential with related endorsements; screening and written and physical examinations may apply, and open-ocean service requires USCG-verified STCW training.

What the civilian work involves
  • Monitor engine, machinery, or equipment indicators when vessels are underway, and report abnormalities to appropriate shipboard staff.
  • Monitor and test operations of engines or other equipment so that malfunctions and their causes can be identified.
  • Start engines to propel ships, and regulate engines and power transmissions to control speeds of ships, according to directions from captains or bridge computers.

Stationary Engineers and Boiler Operators

Marine power plant and heating-system maintenance experience transfers to operating and troubleshooting stationary engines and auxiliary equipment.

How to prepare: Compare your documented equipment experience with the license class for the plant and jurisdiction you want to work in, then target boiler-operation training for any gaps. Some state and local governments require experience and a written licensing exam, with license classes limiting equipment type and size; moving jurisdictions may require another exam.

What the civilian work involves
  • Operate or tend stationary engines, boilers, and auxiliary equipment, such as pumps, compressors, or air-conditioning equipment, to supply and maintain steam or heat for buildings, marine vessels, or pneumatic tools.
  • Analyze problems and take appropriate action to ensure continuous and reliable operation of equipment and systems.
  • Observe and interpret readings on gauges, meters, and charts registering various aspects of boiler operation to ensure that boilers are operating properly.
Civilian tools and software (examples)
  • Building management system software

Training & Development

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

Getting Started

  • Certified Maintenance and Reliability Professionals (CMRP)

    Provide optional evidence of maintenance and reliability knowledge supporting equipment upkeep in shipboard or stationary plant operations.

    Eligibility and preparation: No minimum education or work experience is required; candidates must not have taken the exam within the preceding six months.

    For: Ship Engineers, Stationary Engineers and Boiler Operators

Notes & Sources

  • Verified duties support operating and maintaining vessel machinery, not the hull design and structural analysis work of naval architects.
Evidence for this guidance (7 documents)
  1. Army COOL MOC feed: 881A Marine Engineering Officer

    [1] data/authority/army-codes.json entry 881A (OSD COOL feed, fetched 2026-07-25); DB rank warrant_officer, authority codeType warrant_officer

    Supports: Marine repair and overhaul contract oversight, Fuel, water, and ballast loading supervision, Shipboard machinery inspection and repair documentation, Propulsion and auxiliary systems maintenance oversight, Ship Engineers (O*NET 53-5031.00), Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  2. O*NET: Ship Engineers

    [2] O*NET 30.3 occupational data

    Supports: Ship Engineers (O*NET 53-5031.00)

  3. Bureau of Labor Statistics: Water Transportation Workers

    [3] How to Become; training, licenses and related experience; updated August 27, 2026, checked September 23, 2026

    Supports: Ship Engineers (O*NET 53-5031.00)

  4. O*NET: Stationary Engineers and Boiler Operators

    [4] O*NET 30.3 occupational data

    Supports: Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  5. Bureau of Labor Statistics: Stationary Engineers and Boiler Operators

    [5] How to Become a Stationary Engineer or Boiler Operator; Licenses, Certifications, and Registrations; page dated 2026-08-27, retrieved 2026-09-23

    Supports: Stationary Engineers and Boiler Operators (O*NET 51-8021.00)

  6. COOL credential mapping: Certified Maintenance and Reliability Professionals (CMRP)

    [6] 881A cached COOL credential feed

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

  7. Society for Maintenance and Reliability Professionals: CMRP eligibility

    [7] Eligibility; retrieved 23 September 2026

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

Defense contractor jobs for 881A

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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