Everything You Need to Know About Junior Engineer Jobs

If you’re interested in beginning a career at sea and you have an interest in mechanics and engineering, becoming a Junior Marine Engineer on a ship might be the right maritime career path for you.

In this blog post we’re going to take a look at a Junior Engineer’s duties and responsibilities, what you might be doing in a typical day onboard a vessel, who Junior Engineers report to, and what the skills, interests and attributes you will need to become a successful Marine Engineer are.

This blog post is one in a series of articles which explores many of the different careers to be found in the merchant marine industry, including on cargo and container ships, chemical and oil tankers, and cruise ships.

If you’d like to learn more about becoming an Able Bodied Seaman, a Cook on a ship or a Chief Steward or Stewardess, for example, we have the answers!

ARE YOU LOOKING FOR JUNIOR ENGINEER JOBS? VIEW MARTIDE’S JUNIOR ENGINEER JOBS ON SHIPS NOW!

But for now, let’s dive into what a Junior Engineer on a ship is.

What do Junior Engineers do on ships?

First of all, let’s look at the hierarchy onboard a vessel. Careers in the maritime industry are strictly mapped out and seafarer ranks and superiority are taken seriously.

The shipping industry is an ancient one and some of those old habits die hard, but mostly this chain of command is necessary because ships - of any size and type - can be dangerous places to work, and orders need to be given and received with no room for error or accident.

Read more: Everything You Need to Know About Navigation Officer Jobs

(We’ll get into the traits you should have as a Junior Engineer on a vessel later in the post, but it’s safe to say that if you have a problem with authority or taking orders, this isn’t the career for you!)

Who works in a ship’s Engine Department?

So, back to that hierarchy. A Junior Engineer works, unsurprisingly, in the Engine Department. There are, generally speaking, three departments onboard the average merchant vessel: The Engine Department, the Deck Department and the Galley (AKA the kitchen.)

Depending on the size of the ship and the company that owns her, there will be a varying number of people in each department. It might surprise you to know that many container ships and tankers, even the big ones, only sail with around twelve to fifteen seafarers onboard.

Of course, cruise ships will be different and the crew will be made up from all the usual jobs at sea you would think of such as Chief Officers, Bosuns and Ordinary Seamen as well as other specialized cruise ship jobs such as Plumbers, Bartenders, Carpenters, Retail Workers, Electricians, Entertainers, Stewards and even Waste Disposal Operators.

In theory, the Engine Department consists of the following seafarer ranks: Chief Engineer, Second Engineer, Third Engineer, Fourth Engineer and Junior Engineer.

Again, depending on the vessel and company, these ranks might have different names. For example, the Junior Engineer might also be known as any of the following:

• Second Assistant Engineer

• Third Assistant Engineer

• Assistant Engineer

• Engine Cadet

What is a typical day like for a Junior Engineer?

Junior Engineers assist the vessel’s Chief Engineer and any other engineers who are on duty. The nature of the work takes place in the ship’s hull, in the engine room.

As a Junior Engineer, you will be supporting the operation of the main engines, the electrical generation, the steering mechanism, and the other major subsystems.

You must ensure that safety regulations are adhered to and you will be communicating with the other engineers about the running of technical operations.

ARE YOU LOOKING FOR JUNIOR ENGINEER JOBS? VIEW MARTIDE’S JUNIOR ENGINEER JOBS ON SHIPS NOW!

Basically, you are there to assist your superiors and learn the ropes so that you can progress through the ranks and become a Chief Engineer, if you so wish.

And while you won’t be responsible for any of the operations, you should do your best to get involved and learn as much as you can so that your career progression is a successful one.

What are the duties and responsibilities of a Junior Engineer onboard a vessel?

Again, we’re going to preface this by saying that vessels, shipowners, companies and even superiors differ so this is only meant to be a guideline to the average Junior Engineer job.

Having said that, you may well find yourself doing some of the following Junior Engineer duties and responsibilities:

• Obeying and taking orders from your superiors - this is a given!

• Learning the location and working principles of all of the vessel’s machinery

• Learning how to fill in the engine log book

• Understanding the Engine Department’s documentation, especially that of the engineer directly above you

• Familiarizing yourself with safety equipment and the procedures to be followed in the event of an emergency

• Learning how to use all the tools and equipment needed by the department

• Cleaning machinery and areas in the department

• Becoming familiar with basic vessel operations

What makes a good Junior Engineer?

All seafarer jobs require some specific personality traits. You can’t be afraid of hard work and you must be able to take orders - unless you’re the captain - known as the Master on merchant vessels.

Being punctual is important, if you show up to a watch late, you’re not going to make any friends in the Engine Department.

You also need to be able to cope with being away from home for months at a time. Some people love this aspect of seafarer jobs and some merely tolerate it. If you’re mostly okay with being away from friends and family, then life at sea will be easier for you.

In a nutshell, mental wellness and a strong mind are important attributes for seafarers to possess, but physical fitness is also crucial for anyone who wants to become a Junior Engineer on a ship.

You will be on your feet for a lot of the day and your superiors are sure to keep you busy with tasks such as maintenance and cleaning when things are quiet!

It also goes without saying that an interest in all things mechanical is a must!

Other entry level cargo ship jobs

If being a Junior Engineer doesn’t sound like the maritime career for you, there are other ways into the industry. Here are a few other entry level jobs on ships that you could consider:

• Messman - Basically an assistant to the Cook or the ship’s Chief Cook, you’ll be serving meals and keeping the crew mess clean and tidy

• Wiper - Tasked with keeping the engine room clean - AKA wiping!

• Electrical Cadet moving up to Junior Electrician - if electrics interest you more than engines, this might be the way to start your maritime career at sea

• Deck Cadet - Want to progress through the ranks to become a Deckhand, Ordinary Seaman, Able Bodied Seaman, Officer, Chief Officer then eventually Master?

• Oiler - Helps the Engineers maintain the right amount of lubrication for the propulsion engine system - among other stuff

• Motorman - Helps to operate, maintain, and if necessary, repair the ship’s engine and propulsion systems.

And some more maritime careers

There are so many different types of maritime jobs that if you have an interest in the shipping industry, you should be able to find something that suits your skills and interests.

ARE YOU LOOKING FOR JUNIOR ENGINEER JOBS? VIEW MARTIDE’S JUNIOR ENGINEER JOBS ON SHIPS NOW!

From working as a Pumpman and making sure that the cargo oil on a tanker is flowing into the correct pipes and is able to be collected without any problems to being a Shipfitter, who might work ashore or at sea, building, mending and maintaining vessels, there are plenty of options.

Or how about working up to being an Electro-Technical Officer who is responsible for ensuring that all of the electrical and electronic equipment onboard is monitored and maintained. Or, maybe you’ve driven an excavator on land - in which case you might be suitable for working as an Excavator Driver on a ship.

How can Martide help you find a seafarer job?

If you’re on the first rung of the seafarer career ladder and you’re looking for a career in maritime, Martide is the seafarer job site to visit.

We are looking for crew of all ages and abilities so why not check out our seafarer jobs or download our mobile app for seafarers which is free and available on the App Store and Google Play.

Frequently Asked Questions About Junior Engineer Jobs 

1. What does a Junior Engineer do on a ship? 

A Junior Engineer (also known as a Fourth Engineer on some vessels) is part of the ship’s engineering department, working under the supervision of senior engineers to keep all mechanical and electrical systems running smoothly. Their responsibilities include checking machinery, assisting with maintenance and repairs, monitoring fuel and lubrication systems, and helping with daily engine room operations. Essentially, they make sure the ship’s “heart” — the engine room — keeps beating efficiently and safely. 

2. How do you become a Junior Engineer? 

To become a Junior Engineer, you’ll need to complete an approved marine engineering or maritime studies program at a recognized academy or university. You must also finish your STCW Basic Safety Training, gain required sea service as a cadet or trainee, and pass your Certificate of Competency (CoC) exams issued by your national maritime administration. Once qualified, you can join a ship as a Junior Engineer and start gaining hands-on experience at sea. 

3. What are the main duties of a Junior Engineer? 

Typical daily tasks include: 

• Monitoring engine room machinery and recording readings 

• Assisting with fuel transfers and bunkering operations 

• Performing maintenance on pumps, compressors, generators, and auxiliary systems 

• Ensuring compliance with safety and pollution prevention procedures 

• Supporting senior engineers during inspections, drills, and emergencies 

It’s a varied, practical role that offers excellent experience for anyone pursuing a long-term career in ship engineering. 

4. What skills are important for a Junior Engineer? 

A good Junior Engineer needs to be technically skilled, detail-oriented, and safety conscious. Strong problem-solving abilities, teamwork, and a solid understanding of mechanical and electrical systems are essential. Communication skills are also key, since you’ll be working closely with engineers, officers, and sometimes the deck department to coordinate operations. 

5. What qualifications do you need to work as a Junior Engineer? 

At minimum, you’ll need: 

• An approved marine engineering qualification (degree or diploma level) 

• STCW Basic Safety Training (firefighting, survival, first aid, and personal safety) 

• A valid medical fitness certificate (meeting STCW and MLC standards) 

• A Certificate of Competency (CoC) as a Junior Engineer or equivalent 

Additional certificates like High Voltage Training, Engine Room Resource Management (ERRM), or Oil/Chemical Tanker Familiarization can improve employability, especially for certain vessel types. 

6. What is a typical day like for a Junior Engineer? 

Life onboard as a Junior Engineer can be busy but rewarding. Your day might start with a machinery round, checking engine performance and recording temperatures, pressures, and fluid levels. You could then assist in maintenance tasks, prepare tools, or help with fuel transfers. In between, you’ll also take part in safety drills and maintain engine room cleanliness and order. It’s hands-on, technical work — ideal for those who enjoy solving mechanical challenges in a dynamic environment. 

7. What’s the difference between a Junior Engineer and a Cadet? 

A Cadet is a trainee still undergoing practical sea training before earning a professional license. A Junior Engineer, on the other hand, is a qualified officer who has completed their cadetship and earned a CoC, giving them official responsibilities in the engine room. In short — the Junior Engineer is a licensed professional, while the Cadet is still in training. 

8. Can a Junior Engineer progress to higher ranks? 

Absolutely! With additional sea time, training, and further examinations, you can advance through the engineering ranks — from Third Engineer to Second Engineer, and eventually to Chief Engineer, who oversees all technical operations on board. The maritime industry rewards dedication and ongoing professional development, so your career can progress steadily with experience and learning. 

9. What kind of ships do Junior Engineers work on? 

Junior Engineers can work on a wide range of vessels, including cargo ships, bulk carriers, tankers, container ships, offshore support vessels, and cruise ships. The core engineering principles are similar, but each vessel type has unique machinery and operating conditions, making every posting a new learning opportunity. 

10. Is being a Junior Engineer a good career choice? 

Definitely! It’s one of the best entry points for anyone passionate about engineering and technology who also wants a career at sea. The role combines technical expertise, problem-solving, and teamwork, offering excellent opportunities for growth and international travel. While it can be demanding and involve long hours, the rewards — both professional and personal — make it a highly respected and well-paid career path in the maritime industry. 

Read the previous article in this series: Everything You Need to Know About Electrical and ETO Cadet Jobs

Read the next article in this series: Everything You Need to Know About Marine Pilot Jobs

This blog post was originally published on October 27th 2022 and updated on December 10th 2025