Engineman

Engineman
Name	Engineman
Type	Occupational rating
Branch	United States Navy
Abbreviation	EN
Established	19th century
Role	Ship propulsion maintenance
Garrison	Naval Station Norfolk, Naval Air Station Jacksonville

Engineman is a United States Navy occupational rating responsible for operation, maintenance, and repair of shipboard diesel engines, auxiliary propulsion systems, and related mechanical equipment. The rating interfaces with Machinist's Mate, Hull Technician, Electrician's Mate, Gas Turbine System Technician (Mechanical), and Aviation Machinist's Mate communities aboard surface ships, submarines, and shore installations such as Naval Shipyard Portsmouth and Naval Station Mayport. Enginemen routinely support deployments with U.S. Navy Pacific Fleet, U.S. Navy Atlantic Fleet, U.S. Naval Forces Europe, and joint operations alongside United States Marine Corps, United States Coast Guard, and allied navies including Royal Navy, Royal Australian Navy, Japan Maritime Self-Defense Force, and Royal Canadian Navy.

History

The rating traces roots to 19th-century steam engineering work aboard vessels of the United States Navy during the American Civil War era when engineering specialties evolved alongside advances in propulsion such as steam reciprocating engines and early marine diesel prototypes. Transitioning through the Spanish–American War and the World War I industrial expansion, fuel systems and internal combustion expertise grew in importance with influences from engineers associated with firms like General Motors and Fairbanks-Morse. By the World War II period, diesel propulsion and auxiliary machinery roles formalized into dedicated ratings as the Navy expanded logistics highlighted by operations in the Atlantic campaign and Pacific War. Cold War-era requirements, including operations in the Vietnam War and peacetime ship maintenance at facilities like Puget Sound Naval Shipyard, further defined the tradecraft and specialized training paths.

Role and responsibilities

Enginemen perform duties central to ship and shore station readiness: operation and preventive maintenance of main propulsion diesels, auxiliary diesel generators, seawater pumps, air compressors, and hydraulic systems. They collaborate with Chief Petty Officer leadership, coordinate with Supply Corps for parts logistics, and support Naval Sea Systems Command directives on maintenance intervals. In underway operations with task forces such as Carrier Strike Group Two and Expeditionary Strike Group Five, Enginemen ensure propulsion availability for missions ordered by United States Fleet Forces Command or Commander, Naval Forces Europe-Africa. On small craft and patrol boats used by Coast Guard-affiliated detachments or Naval Special Warfare support units, they maintain compact diesel packages and support interoperability with allied platforms like Littoral Combat Ship variants.

Training and qualification

Initial training begins in Navy Recruit Training Command and continues at technical schools at locations historically associated with diesel instruction, including Great Lakes Naval Training Center and other Fleet Training Centers. Advancement requires completion of Structured On-the-Job Training (SOJT) billets, qualification under the Navy Personnel Command standards, and passing rating exams administered by Chief of Naval Personnel. Specialized courses at institutions such as Surface Warfare Schools Command or manufacturer programs from Caterpillar Inc., Wärtsilä, and MTU Friedrichshafen augment fleet training. Qualification badges and watchstanding credentials align with Enlisted Surface Warfare Specialist and engineering watchbill requirements endorsed by Naval Education and Training Command.

Equipment and systems

Enginemen work on a wide array of marine diesel engines from legacy two-stroke and four-stroke designs to modern medium-speed units produced by manufacturers including Fairbanks-Morse, Wärtsilä, MAN Energy Solutions, Caterpillar Inc., and MTU Friedrichshafen. They maintain reduction gears, shafting, couplings, controllable pitch propellers used on Guided-missile Destroyer and auxiliary ships, fuel systems, lube oil purification plants, freshwater generators, and ventilation systems specified by Naval Sea Systems Command engineering drawings. Diagnostic tools and condition-based monitoring systems supplied by companies like SKF and National Instruments are employed alongside traditional hand tools in compliance with technical manuals produced by Bureau of Ships predecessors and current NAVSEA documentation.

Career progression and ratings

Career pathways follow enlisted advancement from seaman recruit to chief petty officer and beyond into senior enlisted community positions such as Command Master Chief or technical leading roles within Fleet Maintenance and Naval Ship Systems. Advancement examinations and career management are overseen by Naval Personnel Command with ratings codes assigned by Office of the Chief of Naval Operations. Some Enginemen transition to warrant officer programs such as Chief Warrant Officer, attend commissioning programs like Seaman to Admiral-21 or apply for programs leading to assignments with Civil Engineer Corps or civilian maritime roles in companies including Maersk, Crowley Maritime, Huntington Ingalls Industries, and NASSCO.

Notable operations and deployments

Enginemen have supported major operations and contingencies including Operation Desert Storm, Operation Enduring Freedom, Operation Iraqi Freedom, and humanitarian missions following Hurricane Katrina and disaster relief in the Indian Ocean tsunami response. They have been essential aboard replenishment oilers in Operation Sea Angel-type humanitarian efforts, escorts in the Gulf of Aden counter-piracy deployments, and multinational exercises like RIMPAC and NATO Exercise Trident Juncture. Shore-based support roles have included maintenance at Naval Base San Diego and shipyard availabilities supporting USS Gerald R. Ford (CVN-78) maintenance periods.

Category:United States Navy ratings