Commercial diving is a trade with a physical shelf life, and anyone in it does well to plan for that from year one. The wear doesn't come from an accident but from accumulation: joints, ears, back and repeated cold. The good news is that the industry offers technical routes onward that let you keep working once your body asks to stop going down.
There's a conversation that in commercial diving tends to happen late when it should happen early: how long is this actually going to last.
Nobody goes into the trade thinking about the end. People come in for the work, for the dinero and for the kind of life it offers. But it's physical work, with repeated exposure to pressure, cold and load, and those things add up. Anyone who accepts that from the start builds a long career. Anyone who ignores it usually finds out once there's no room left to manoeuvre.
Where the wear comes from
It's worth separating two things. One is the accident: decompression sickness, barotrauma, the injury. These are identifiable events, with a response protocol and treatment. The other is wear, which has no single moment and no incident report, and which is what actually ends careers.
The musculoskeletal system
Professional diving equipment is heavy and gets worn out of the water almost as much as in it: while kitting up, walking the deck, entering and exiting. On top of that there's heavy tool work, forced postures in impossible spaces, and straining efforts done breath-held when there's no purchase to work from.
The most common result is the back, followed by shoulders and knees. It isn't a problem unique to diving — it's shared with any heavy industrial trade — but here it's made worse because the load gets lifted under precarious balance.
The ears
Years of equalising, exposure to cold and contaminated water, and repeated infections all leave their mark. Ear problems are among the most frequent causes of time off, and in their chronic form, among the ones that most often pull someone out of the water for good.
It's also one of the areas where basic prevention pays off the most: drying, hygiene, and not diving with an inflamed ear even if it means losing days. A poorly healed ear turns into a chronic one with surprising ease.
Pressure exposure
Repeated pressure exposure has effects that have been studied for decades and that form part of the medical monitoring of professional divers, including dysbaric osteonecrosis, a bone injury historically associated with hyperbaric exposure and, in particular, with inadequate decompression.
It's worth being honest here about what's known and what isn't. The incidence of these conditions is closely tied to the quality of the procedures applied, and modern professional schemes are far stricter than those of the trade's early decades. Any specific figure depends on the population studied and the period, so the useful takeaway isn't the number: it's the practical conclusion that respecting decompression isn't a recommendation, it's the single best-returning investment a diver makes in their own body.
The cold
Repeated cold exposure has a cumulative effect that shows up more in recovery than in the working day itself. Looking after thermal control isn't just a matter of daily performance: it's one of the decisions that weighs most heavily over the long run.
The medical exam as a thermometer
El fitness-to-dive medical exam exists exactly for this. It isn't an annual formality to renew a piece of paper: it's the periodic assessment that determines whether someone is still fit to work, and its criteria are set by the regulations that apply in each country.
The temptation to play down symptoms in front of the doctor is understandable, and it's a serious mistake. A problem caught early is usually treatable; the same problem three years later can be the end of a career. The diving doctor isn't the diver's enemy: they're the only person who sees the whole trajectory.
How to make a career last longer
There are decisions that, made early, change the outcome.
Work with technique, not with force. The veteran diver stands out by doing things with less effort, not more. Setting up the manoeuvre properly, using the right means, and rigging a point of purchase when needed — a work platform, a well-loaded basket — saves years of wear on the back.
Don't negotiate on decompression. This is the rule that has saved the most careers, and the one that comes under the most outside pressure when the schedule is tight. A diver who accepts cuts here is financing the project with their own body.
Keep up physical condition out of the water. Stabilising muscle and mobility are what protect joints that are going to take load for years. During rotations at home there's plenty of time for that.
Get treated promptly. It's the small injuries dragged along from one campaign to the next that turn chronic. Losing a campaign to heal properly is almost always cheap in the end.
The second career
What sets commercial diving apart from other physical trades is that it has routes onward within the industry itself, and good ones.
Supervision is the natural progression: the move from diver to diving supervisor draws directly on the experience already built up and trades physical effort for responsibility. Inspection is the other major route: certifying as an underwater inspector inspector opens up a recurring job market that's far less physically demanding.
There are also support roles — life support technician, chamber operator — and the whole ROV world, where a diver's underwater experience is a real asset. And out of the water, training in schools, project management, and technical and commercial roles at companies in the industry.
All of these doors have something in common: they're prepared in advance. The inspection certification is earned while still diving, supervisory experience is built by taking on responsibility before it's on the payslip, and the language is studied years before it's needed. Nobody improvises a second career the month their medical fitness is withdrawn.
The financial factor
There's a dimension to all this that rarely gets mentioned and that shapes decisions just as much as health does: money. Commercial diving pays well, but it's income tied to activity. You don't get paid for being fit, you get paid for being at work, and an injury that keeps you out of the water cuts off income right when expenses go up.
That's why financial planning is as much a part of career planning as training is. The insurance and social protection available to an offshore diver vary hugely by country, contract type and agency, and understanding them before signing is on each individual. Working without cover for temporary incapacity in a trade with this risk profile is a bet many people make without realising they're making it.
The same logic applies to saving. The years of peak physical capacity coincide with the years of peak income, and they're the ones that make it possible to fund the move into technical work if it arrives sooner than expected.
The conversation worth having early
This article isn't meant to put anyone off. Commercial diving is still one of the few trades where someone without a university degree can build a high income and an interesting life within a few years.
But it's a trade done with the body, and the body has a finite budget. Spending it wisely — protecting it where you can and turning experience into qualification while you're still in peak form — is the difference between a ten-year career and a whole working life inside the industry.
None of the above replaces an individual medical assessment. Any persistent symptom, any doubt about your own fitness, and any decision on whether to keep diving belongs with the competent specialist doctor, who is the one who knows each person's history.
Frequently asked questions
How many years can you work as a professional diver?
There's no fixed age: what decides it is the annual medical fitness assessment and each person's actual condition. Some divers retire from the water early through injury, and others stay operational for many years. The prudent approach is not to plan a career that depends on staying fit indefinitely.
What physical problems are most common in the long term?
Musculoskeletal problems — shoulders, knees and above all the back — ear problems from years of equalising and repeated infections, and general wear tied to cold, exertion and working with heavy equipment.
What is dysbaric osteonecrosis?
A bone injury historically associated with repeated pressure exposure, especially under inadequate decompression. Modern professional schemes monitor for it as part of medical surveillance, and its incidence is tied to the quality of the procedures applied.
Does the annual medical exam pick up this wear?
That's exactly its purpose. The fitness-to-dive medical exam periodically assesses the candidate's condition and determines whether they're still fit, using criteria set by the regulations that apply in each country.
What routes are there once you can no longer dive?
Supervision, inspection, project management, teaching at schools, life support technician, chamber operation, ROV operation and piloting, and technical and commercial roles at industry companies. Almost all of them need preparation in advance, which is why it's worth starting early.
Is there anything you can do to make a career last longer?
Look after technique rather than brute force, respect decompression procedures without exception, keep up physical condition out of the water, treat small injuries before they become big ones, and train in parallel so a route onward is ready.
Published 1 September 2026 · By Arthur More, professional saturation diver
Photo: SFU - Communications & Marketing · CC BY via Openverse
This article is part of our in-depth guide to commercial diver requirements: the medical, eyesight and age limit — the complete picture, with sources.
This article is part of our in-depth guide to commercial diver requirements: the medical, eyesight and age limit — the complete picture, with sources.
This article is part of our in-depth guide to commercial diver requirements: the medical, eyesight and age limit — the complete picture, with sources.
This article is part of our in-depth guide to commercial diver requirements: the medical, eyesight and age limit — the complete picture, with sources.