Marine engineering is one of the most rewarding and in-demand technical careers in the country. Marine engineers design, build, and operate the propulsion plants, electrical systems, and machinery that keep vessels running -- from Navy destroyers and Military Sealift Command supply ships to offshore platforms and commercial tankers. The pay reflects the specialization: the median wage sits above $105,000 a year, and demand consistently outpaces the small supply of qualified graduates.

But there's no single road into the field. Depending on whether you want to sail, design ships ashore, or transition from military service, the degrees and credentials you'll need look very different. This guide walks through how to become a marine engineer in the U.S., step by step -- from choosing a program to earning your license to landing that first job.

Step 1: Earn the Right Degree

Almost every marine engineering career begins with a bachelor's degree in marine engineering, naval architecture, or a closely related field. But one detail matters more than the major itself: accreditation.

If there's any chance you'll want to work in a shoreside design role and eventually earn a Professional Engineer (PE) license, enroll in an ABET-accredited engineering program. ABET accreditation is the gateway to the Fundamentals of Engineering exam and, ultimately, the PE. It also carries weight on the licensing side: graduates of an ABET-accredited marine engineering program need far less documented sea time to sit for a U.S. Coast Guard officer license than those coming up through experience alone.

You generally have three types of schools to choose from:

• Maritime academies -- The U.S. Merchant Marine Academy (USMMA), the six state maritime academies (California, Maine, SUNY Maritime, Texas A&M, Massachusetts, and Great Lakes), and the service academies (Naval Academy, Coast Guard Academy). Engineering graduates of these programs are typically eligible to test for a Coast Guard license immediately upon graduation.
• NAME programs -- Universities offering a combined naval architecture and marine engineering degree, such as Webb Institute, the University of Michigan, the University of New Orleans, and SUNY Maritime. These lean toward the design side of the profession.
• Related ABET engineering degrees -- Mechanical, electrical, or ocean engineering degrees can also open the door, though they may require additional sea time or crossover coursework depending on your goal.

Because so few schools teach these disciplines, the supply of graduates is limited and placement rates are exceptional -- Webb Institute, for instance, reports a 100 percent placement rate. Choosing between the design and seagoing tracks isn't always obvious; our guide on naval architect vs. marine engineer breaks down the difference in detail.

Step 2: Get Hands-On Experience Through Internships and Sea Time

Classroom theory only gets you so far in a field defined by physical machinery. The strongest programs build structured, hands-on experience directly into the curriculum.

Webb Institute offers a good model: every January and February, students are required to work in the marine industry. Freshmen work in shipyard production departments, sophomores go to sea as cadet observers, and upperclassmen intern at design and engineering firms. That progression -- from the shop floor, to the deck plates, to the drawing board -- gives graduates a systems-level feel for how vessels actually come together.

For students on the licensed track, this sea time is more than résumé-building; it's a legal prerequisite. Coast Guard officer licenses require documented service in the engine room, and academy cadet cruises are designed to accumulate exactly that qualifying time before graduation.

Step 3: Choose Your Path — Seagoing or Shoreside

Before pursuing a license, decide which kind of marine engineer you want to be, because the credentials diverge sharply from here.

Seagoing marine engineers are licensed officers who operate and maintain a ship's machinery at sea. Their path runs through the Coast Guard credentialing system and, for international voyages, the STCW convention.

Shoreside marine engineers design systems and vessels from land -- at shipyards, design firms, equipment manufacturers, and government agencies. Their path runs through the FE and PE licensure system.

Many engineers do both over a career: sail for a few years, then move ashore into design or program work, where hands-on operating experience is a genuine asset. You don't have to pick permanently, but you do need to know which credential to chase first.

Step 4: Earn Your License

For the Seagoing Path: The USCG Third Assistant Engineer (3AE) License

The entry-level license for a shipboard engineering officer is the Third Assistant Engineer (3AE). Maritime academy graduates are generally eligible to test right away. Everyone else takes the "hawsepipe" route, documenting extensive engine-room service -- on the order of 1,080 days -- to qualify.

A few requirements are worth knowing early:

• At least one-third of your sea service must be on the specific propulsion type you're testing for -- steam, motor (diesel), or gas turbine. An engineer whose entire background is gas turbine may need a crossover course to add a diesel endorsement, which most commercial employers want.
• Before testing, you'll need certificates in Basic and Advanced Firefighting and Proficiency in Survival Craft.
• The 3AE exam covers thermodynamics, fluid mechanics, electrical safety, auxiliary machinery, and maritime regulatory law.

A national 3AE endorsement lets you work domestic routes -- coastwise tugs, offshore supply vessels, and the like. But it is not sufficient for international voyages on its own.

For International Voyages: The STCW OICEW Endorsement

To stand an engineering watch on ships operating internationally, you need the Officer in Charge of an Engineering Watch (OICEW) endorsement under the STCW convention. This is a substantial step beyond the 3AE, requiring roughly 17 weeks of Coast Guard-approved coursework -- engine room resource management, motor and auxiliary plants, electrical machinery, control systems, and more -- plus a signed record of hands-on practical assessments.

For the Shoreside Path: The FE and PE (NAME)

If you're heading into design, the credential that ultimately matters is the Professional Engineer (PE) license. The sequence is:

1. Graduate from an ABET-accredited program.
2. Pass the Fundamentals of Engineering (FE) exam, earning Engineer-in-Training (EIT) status.
3. Accrue at least four years of qualifying engineering experience.
4. Pass the PE exam in Naval Architecture and Marine Engineering (NAME), administered by NCEES.

The PE NAME exam is offered just once a year, typically in October, and it's demanding -- 85 questions over 8.5 hours, spanning hydrostatics and stability, structural design, hydrodynamics, propulsion, electrical and piping systems, regulations, and more, with recent first-time pass rates in the mid-to-upper 50s to low 60s percent. Candidates often lean on the SNAME review course and classic texts like Principles of Naval Architecture to prepare. (One note: because electrical topics are only a small share of the exam, marine electrical specialists are frequently better served by the PE in Electrical Engineering.)

You can build a solid shoreside career without a PE, but you can't independently stamp or market your own engineering design work without one.

A Special Path: Transitioning from the U.S. Navy

The Navy produces exceptional engineering talent -- machinist's mates, electrician's mates, enginemen, and gas turbine technicians who manage complex propulsion plants daily. But military skills don't convert automatically to civilian credentials, and understanding the mechanics of the transition is essential.

The Coast Guard's National Maritime Center evaluates military sea service rather than accepting it wholesale. Because Navy vessels spend significant time in port, service is generally credited at 60 percent of total time assigned (for applications after March 2019). The practical implication: accruing the 1,080 creditable days for a 3AE license means having been assigned to qualifying vessels for roughly 1,800 days. Documentation matters enormously here -- a DD-214 alone won't cut it; you'll need an official Transcript of Sea Service detailing vessels, propulsion power, and watchstanding duties.

Two features of the current system work strongly in a transitioning engineer's favor. First, recent revisions let a military EOOW sign off on most STCW practical assessments aboard ship, sidestepping the civilian assessor bottleneck that has stalled many mariners. Second, Navy Credentialing Opportunities On-Line (COOL) funds credentialing exams and Coast Guard evaluation fees -- with no stated per-sailor dollar cap -- though it's an exam-funding program, not a training one, so tuition for the STCW course blocks comes from Tuition Assistance or the GI Bill instead. Timing is critical: funding must be pre-approved through your command before you register or pay for anything.

Step 5: Land Your First Job

With a degree and the right credentials in hand, several strong early-career landing spots open up.

Military Sealift Command (MSC) operates federally owned ships crewed by civilian mariners, making it a natural bridge for those leaving the Navy. It requires the full civilian credential set (MMC, STCW endorsements, TWIC, medical clearance). Starting base pay for a civilian marine engineer at MSC runs around $85,000, and climbs quickly with overtime and progression toward First Assistant and Chief Engineer.

Commercial and offshore work -- offshore supply vessels in the Gulf of Mexico, coastal tugs -- offers fast entry. Even before a full 3AE, an engineer with a QMED endorsement can secure offshore day rates in the $200-$350 range.

Federal civil service is the prime shoreside route. Organizations like Naval Sea Systems Command (NAVSEA) continually seek engineers with practical shipboard knowledge for design, acquisition, and modernization work. Federal engineers are paid on the General Schedule, and a PE-holding engineer with military experience often enters at the GS-12 or GS-13 level, boosted by locality pay in high-cost regions like Washington, D.C. Agencies frequently use Direct Hire Authority to bring credentialed engineers aboard quickly.

Private shipbuilders and design firms round out the picture, employing large numbers of marine engineers and naval architects on new construction, repair, and systems design. For a full breakdown of what these roles pay by sector and location, see our guide to marine engineer salary in the U.S.

Step 6: Keep Advancing

Becoming a marine engineer is the start, not the finish. Maintaining a PE requires ongoing Professional Development Hours (PDHs), and advancing into leadership means staying connected to the profession.

This is where a technical society earns its keep. The American Society of Naval Engineers (ASNE), founded in 1888, publishes the Naval Engineers Journal and offers the Naval Engineering Certificate -- a credential designed to give degreed engineers systems-level naval expertise across domains like ship design, marine electrical systems, combat systems, corrosion, cybersecurity, and autonomous technologies. ASNE symposia such as Technology, Systems, and Ships (TSS) and the Combat Systems Symposium do double duty: they supply the continuing-education hours that keep a PE and the ASNE certificate current, and they put transitioning engineers face-to-face with shipyard executives, defense contractors, and federal hiring managers. Many events offer free or reduced registration for junior officers and enlisted personnel.

The Bottom Line

There's no single way to become a marine engineer, but every route shares the same foundation: an accredited degree, hands-on experience, and the right license for the work you want to do. Whether you sail as a licensed officer, design vessels ashore as a PE, or carry Navy experience into a civilian career, the path takes deliberate planning -- but it leads to a small, high-demand profession that rewards its practitioners with strong pay, steady opportunity, and work that quite literally keeps the fleet moving.

Sources: U.S. Bureau of Labor Statistics, Occupational Outlook Handbook, Marine Engineers and Naval Architects (May 2024); Webb Institute; U.S. Coast Guard National Maritime Center; NCEES; Navy Credentialing Opportunities On-Line (COOL); American Society of Naval Engineers. Credential requirements change periodically — verify current details with the USCG, NCEES, and your state licensing board before acting on them.

Main image caption: U.S. Sailors conduct maintenance in the generator room aboard Arleigh Burke-class guided-missile destroyer USS Mason (DDG 87), July 31, 2026. Mason is deployed to the U.S. 5th Fleet area of operations to support maritime security and stability in the Middle East. (U.S. Navy photo)