Getting a job on a cargo ship in the United States requires a specific credential issued by the Coast Guard, a federal background check, safety training, and a medical exam. The process takes several weeks to several months from start to finish, but no prior experience is necessary for entry-level positions. Here’s how to navigate each step.
The Credential You Need: The MMC
Every person who works aboard a U.S.-flagged commercial vessel needs a Merchant Mariner Credential, or MMC, issued by the U.S. Coast Guard. Think of it as your license to work at sea. To qualify, you must be a U.S. citizen, a lawful permanent resident, or a foreign national enrolled at the U.S. Merchant Marine Academy. There is no minimum age specified for entry-level ratings, but most employers and training programs require applicants to be at least 18.
The application includes a criminal record review and a check of the National Driver Register. A conviction involving dangerous drugs disqualifies you outright unless you can demonstrate rehabilitation and suitability for service. The same applies to anyone with a history of drug addiction or alcohol abuse. DUI convictions and traffic offenses tied to fatal accidents also show up in the screening and can block your application.
Before you can even apply for the MMC, you’ll need a Transportation Worker Identification Credential (TWIC card) from the TSA. This is a biometric ID required for unescorted access to secure areas of ports and vessels. A new TWIC card costs $124, and the application involves its own background check and proof of citizenship or immigration status. Plan on getting your TWIC first, since the MMC application requires it.
STCW Basic Safety Training
Every mariner, regardless of rank, must complete Standards of Training, Certification, and Watchkeeping (STCW) Basic Safety Training. This is an internationally recognized certification that covers four modules:
- Basic firefighting: Classroom instruction plus hands-on drills in fire identification, prevention, and suppression, including search and rescue techniques in dark or smoke-filled spaces.
- Personal survival techniques: How to locate emergency supplies, operate lifesaving equipment, launch rescue boats, and follow abandon-ship procedures.
- Personal safety and social responsibilities: A classroom-only module covering shipboard communication, teamwork, and hazard awareness, followed by an exam.
- Elementary first aid: Basic medical skills and CPR with a focus on maritime situations.
Most original certification courses run five days and are offered at maritime training centers around the country, such as the Maritime Institute of Technology and Graduate Studies (MITAGS) on the East Coast or similar schools on the Gulf and West Coasts. Expect to pay roughly $1,000 to $1,500 out of pocket for the course, though union apprenticeship programs often cover the cost entirely.
Passing the Medical Exam
You’ll need a medical certificate based on Coast Guard Form 719K, completed by a licensed physician. The exam checks three main areas. For vision, deck department workers need correctable eyesight of at least 20/40 in one eye, with uncorrected vision no worse than 20/200 in that same eye. You also need satisfactory color vision. For hearing, you must score 30 decibels or better on an unaided audiometer test in at least one ear and demonstrate at least 90 percent speech discrimination at 65 decibels. For physical ability, the examiner needs to confirm you can climb vertical ladders, navigate inclined stairs without assistance, maintain your balance, and stand and walk for extended periods. If you wear glasses or hearing aids, bring them, but know that the baseline tests measure your unaided ability first.
Entry-Level Positions on Cargo Ships
You don’t need years of experience to start. Cargo ships are organized into three departments, and each one has entry-level roles that require only a basic MMC with the appropriate rating endorsement.
In the deck department, the starting position is ordinary seaman (OS). Your days revolve around maintaining the ship: chipping and scaling rust, priming and painting the hull and superstructure, cleaning decks, and disposing of trash and garbage properly. You’ll also handle deck machinery, operate cranes and forklifts, manage gangways, and assist with loading stores. On watch, you may steer the ship under the supervision of the officer on deck or stand lookout. You’re responsible for keeping common areas like passageways and bathrooms clean. It’s physical, repetitive work, but it builds the sea time you need to advance.
In the engine department, the entry role is wiper. You assist engineers with cleaning and maintaining machinery spaces, and you learn the mechanical systems that keep the ship running. In the steward department, the entry role is steward assistant (also called food handler). You help prepare meals, maintain the galley, and keep the crew’s living spaces in order. All three ratings can appear on a single MMC, and many entry-level mariners hold all three endorsements to maximize their job options.
The Union Apprenticeship Path
The most structured way into the industry is through a maritime union apprenticeship. The Seafarers International Union (SIU) runs an Unlicensed Apprentice Program at the Paul Hall Center for Maritime Training and Education, located at the Seafarers Harry Lundeberg School of Seamanship in Piney Point, Maryland. The application is free.
The process starts with an online application, after which you’re invited to a local SIU hall for an interview and reading and math tests. If selected, you move on to a physical exam, drug screening, and required vaccinations. The program covers your STCW training, MMC application, and initial sea time, effectively bundling everything you’d otherwise have to arrange and pay for on your own. Upon completion, you gain access to SIU-affiliated hiring halls where jobs are dispatched based on seniority and availability.
There’s one important catch: if you’ve previously attended the apprentice program, you cannot reapply. And at every stage, from entry to job dispatch, you must pass Coast Guard-approved drug tests. Maritime employers and unions take drug screening seriously, and a failed test can end your career before it starts.
What Daily Life Looks Like
Cargo ship crews typically work on a watch system: four hours on duty, eight hours off, cycling around the clock. A typical working day runs 8 to 10 hours, with overtime common during port calls, cargo operations, or maintenance projects. The “off” hours are yours for eating, sleeping, exercising, and whatever recreation the ship offers, which usually amounts to a gym, a lounge with a TV, and an internet connection that ranges from slow to nonexistent depending on the vessel and route.
Contract lengths vary by company and trade route. Domestic shipping contracts (running between U.S. ports) often follow a rotation of roughly equal time on and time off, such as 30 days aboard and 30 days home, or 60 and 30. International deep-sea voyages tend to run longer, with contracts sometimes stretching to four or five months before you rotate home. The specifics are spelled out in your shipping articles, the formal agreement you sign before each voyage.
The work is physically demanding and the isolation is real. You’ll live in a small cabin, eat meals prepared on board, and spend weeks seeing the same dozen or so crewmates. Many people find this rhythm suits them well. Others discover it doesn’t. A single contract will tell you which camp you fall into.
Building a Career From Entry Level
Sea time is the currency of advancement in the merchant marine. Every day you work aboard a vessel gets logged, and those days accumulate toward the requirements for higher ratings and eventually officer endorsements. An ordinary seaman, for example, typically needs to log a set number of days at sea before qualifying to test for able seaman (AB), which comes with higher pay and more responsibility. From AB, the path continues upward through bosun, third mate, and beyond, each step requiring additional sea time, coursework, and exams.
Engine department workers follow a parallel track from wiper to qualified member of the engine department (QMED) and eventually to licensed engineer. Officer endorsements require U.S. citizenship, so permanent residents can advance through the unlicensed ranks but will hit a ceiling without naturalization.
Pay for entry-level positions varies by employer and union contract, but ordinary seamen on union ships generally earn between $3,000 and $5,000 per month before overtime, with room and board included. You have virtually no living expenses while aboard, which means most of that pay can go straight to savings. As you advance, compensation increases substantially, with licensed officers on large container ships and tankers earning six figures.
How to Get Started Now
If you want to move quickly, start three things in parallel. Apply for your TWIC card at your nearest enrollment center (locations are listed on the TSA website). Schedule your Coast Guard medical exam with a physician familiar with the 719K form. And register for an STCW Basic Safety Training course, or begin your application to a union apprenticeship program. The TWIC card alone can take several weeks to process, so getting it started early prevents it from becoming a bottleneck. Once you have your TWIC, medical certificate, and STCW training complete, you can submit your MMC application to the Coast Guard’s National Maritime Center and start looking for your first ship.