Navy Rating · Engineering

EN Engineman

Current service use not established

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

Overview

Enginemen operate diesel engines for ship propulsion and electrical power generation, and they align fuel, water, and air piping systems. They maintain, test, repair, and overhaul engines, gears, compressors, pumps, heat exchangers, steering engines, clutches, control devices, and controllable pitch propeller systems while recording and analyzing machinery operations.

Minimum ASVAB: VE+AR+MK+AS 188 or VE+AR+MK+AO 193

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

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: milpersman-1306-618-rating-list-2026-04 (source date 2026-04). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Fuel, water, and air piping alignment
  • Controllable pitch propeller system maintenance
  • Pump, compressor, and heat exchanger overhaul
  • Machinery operating record analysis

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

Operating propulsion diesels, maintaining reduction gears and propulsion controls, and analyzing machinery records transfer directly to ship engineering work.

How to prepare: Request a Coast Guard evaluation of your engine-department sea service using an official service transcript or assignment history plus vessel and duty details, not a DD-214 alone. Officer entry requires the applicable MMC endorsement and Coast Guard acceptance of experience, age, citizenship, character, physical health, approved training, professional competence, and drug-test qualifications.

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.

Bus and Truck Mechanics and Diesel Engine Specialists

Diesel engine testing, preventive maintenance, and overhaul provide a strong mechanical foundation for civilian diesel repair.

How to prepare: Complete hands-on training in truck-specific diagnostics, including Cummins INSITE, and brake and chassis systems to bridge the gap from marine engines.

What the civilian work involves
  • Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.
  • Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
Civilian tools and software (examples)
  • Cummins INSITE
  • Computerized maintenance management system software CMMS

Stationary Engineers and Boiler Operators

Operating diesel power equipment and maintaining pumps, compressors, heat exchangers, and fluid systems transfer to stationary plant equipment work.

How to prepare: Compare local license classes with your documented equipment experience, then seek supervised boiler-operation training to address steam-system gaps. Some jurisdictions require equipment-specific licenses based on experience and a written examination.

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.
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.

Career Growth

  • Certified Maintenance and Reliability Professionals (CMRP)

    Develop broader maintenance and reliability knowledge after establishing civilian plant-equipment experience.

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

    For: Stationary Engineers and Boiler Operators

Notes & Sources

  • Most water transportation jobs require a TWIC; open-ocean service requires USCG-verified STCW training.
  • The Coast Guard determines the merchant-service equivalence and endorsement limits of military sea service. Military-service eligibility for Chief Engineer unlimited requires service as an engineer officer.
Evidence for this guidance (10 documents)
  1. NAVPERS 18068F Vol I (NEOCS, Jan 2026 edition): ENGINEMAN (EN)

    [1] Rating chapter "SCOPE OF RATING"; cached text line 31868; NAVPERS 18068F Vol I, 2026-01 edition

    Supports: Fuel, water, and air piping alignment, Controllable pitch propeller system maintenance, Pump, compressor, and heat exchanger overhaul, Machinery operating record analysis, Ship Engineers (O*NET 53-5031.00), Bus and Truck Mechanics and Diesel Engine Specialists (O*NET 49-3031.00), 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. USCG: 46 CFR 10.232 military sea-service evidence and credit

    [4] Paragraphs (a) and (d)(1), official eCFR snapshot September 21, 2026; retrieved September 24

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

  5. USCG: 46 CFR 11.201 officer-endorsement requirements

    [5] Paragraph (a), official eCFR snapshot September 21, 2026; retrieved September 24

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

  6. O*NET: Bus and Truck Mechanics and Diesel Engine Specialists

    [6] O*NET 30.3 occupational data

    Supports: Bus and Truck Mechanics and Diesel Engine Specialists (O*NET 49-3031.00)

  7. O*NET: Stationary Engineers and Boiler Operators

    [7] O*NET 30.3 occupational data

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

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

    [8] 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)

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

    [9] EN cached COOL credential feed

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

  10. Society for Maintenance and Reliability Professionals: CMRP eligibility

    [10] Eligibility; retrieved 23 September 2026

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

Defense contractor jobs for EN

Predecessor codes

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

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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