The Netherlands concentrates dredging, marine construction, offshore wind and operations in the southern North Sea. Professional diving is regulated under Dutch labour law with its own certificates, and the big dredging contractors dominate the market. For a foreigner, the usual route runs through having your qualification recognised and through the language.
The Netherlands is one of those markets that almost never shows up on lists of destinations for commercial divers, and yet it generates an enormous amount of underwater work. The reason is simple: it is a country built literally against the water, with the highest concentration of dredging companies in the world, one of the largest ports in Europe, and a central position in the southern North Sea, where gas, cables, pipelines and wind farms all come together.
This guide runs through how that market is organised, what is required to work in it, and how it differs from the British or Norwegian model that dominates the conversation about the North Sea.
A market with four legs
Dredging and marine construction
The big Dutch dredging contractors operate worldwide: port expansions, coastal regeneration, land reclaimed from the sea, shipping channels. That work generates steady diving, though not always glamorous: inspecting and repairing suction heads, freeing lines, checking discharge pipelines, placing and checking rock armour, supporting mooring work.
It is a niche that rewards divers who understand heavy machinery and know how to work within a large industrial project, with strict planning and continuous shifts.
Hydraulic and port infrastructure
Locks, sluice gates, storm surge barriers, dykes, quays and pontoons. This is submerged civil engineering in its purest form: structural inspection, seal replacement, checking cathodic protection, underwater concreting, cutting and welding. A good deal of it is done in near-zero visibility and in water with current, with working windows dictated by the tide.
Offshore wind
The southern North Sea is one of the areas in the world with the most offshore wind farms installed and under construction. Although a ROV carries out much of the underwater work, there is still diving in the installation and maintenance phases: inspecting the monopile base, checking the scour protection, work at the cable entry point and support for cable operations. We cover this in the article on commercial diving in offshore wind farms.
Offshore energy and cables
Gas platforms, subsea pipelines, electrical interconnectors and telecommunications cables crossing the North Sea. The depth in this area is moderate, which means most of the work is done with surface-supplied diving rather than saturation.
How professional diving is regulated
The Netherlands does not apply the British HSE model or the Norwegian one. It has its own scheme, built into national labour law, with categories of professional diving certificate according to the type of work and depth, and with dedicated roles for the diving supervisor and the diving medic.
In practice, two layers coexist:
The national layer. To work on a project within Dutch territory you need the corresponding local certificate and a valid medical assessment under the country's system. That is what a dredging or hydraulic works contractor requires for a project inside the country.
The international layer. For offshore projects, contractors rely on the framework of IMCA and on internationally recognised certifications, alongside the survival and offshore safety courses required for any embarkation.
If you're coming from abroad, the step you cannot skip is finding out which of the two layers applies to the specific job you're after. Going for a lock construction job inland is not the same as an embarkation on a cable-laying vessel.
The language
This is worth saying plainly because it shapes your real options a great deal. On an international offshore project you work in English and no one will ask you for Dutch. On domestic projects — domestic dredging, ports, hydraulic infrastructure, work for public authorities — Dutch completely changes your prospects, because communication with the surface team, the documentation and the work permit are all in that language.
Many foreign divers get on perfectly well in the first circuit and never enter the second. It is a strategic choice, not an insurmountable obstacle.
What sets this market apart from the British or Norwegian one
Three things.
Depth. The southern North Sea is much shallower than the Norwegian sector or the northern British sector. That shifts the weight of the work towards surface-supplied diving and reduces the relative volume of saturation work compared with markets such as Norway.
A mix of sectors. Here oil and gas are not the only driver. Dredging, hydraulic works and offshore wind carry as much weight, if not more, which makes the market less sensitive to the oil cycle.
Estructura empresarial. The sector is dominated by large, integrated contractors who handle the whole project and either have their own diving teams or subcontract trusted specialists. You get in more through the company's own door than through a crewing generic crewing agency, though these do operate too. You can see the map of players on our page about commercial diving companies.
How to approach the market
Check the equivalence of your qualification. Before you move, write to the relevant authority and to a couple of contractors and ask explicitly whether your certification is accepted and for which category of work. It's free information that saves you from expensive decisions.
Keep your offshore package up to date. Survival, basic safety, medical, and, if you're aiming for inspection work, a qualification such as underwater inspector. Inspection is one of the best levers for employability in this area, because there is a lot of asset to check and few people who know how to document it well.
Target the contractor, not just the agency. In a market with large, integrated companies, getting onto one of their lists is worth more than twenty scattered applications.
Be flexible about the type of project. Many divers arrive looking for offshore work and end up finding their niche in dredging or hydraulic works, which offer continuity and technical experience that is highly valued afterwards.
Who it suits
The Netherlands is a good destination if you're interested in industrial underwater work in the broad sense and not just oil, if you value being able to combine offshore projects with work close to home, and if zero visibility and current don't put you off. It's not the market with the world's highest rates, but it is one of the most diversified, and one of the least dependent on the price of a barrel.
If you're comparing destinations, the general guide on where saturation diving work is puts this market in context against Norway, the United Kingdom, Brazil or the Persian Gulf.
The tide and current factor
There is one factor that shapes diving in this area more than almost anywhere else in Europe: the tide. In estuaries, locks, port access channels and river mouths, the current can go from acceptable to unworkable within minutes.
That means working around ventanas. A day's planning isn't set by the clock but by the tide table: there is a window around slack tide in which it is safe to dive, and the whole operation — rigging, briefing, the diver going in, the task, coming out — is compressed inside it. If the team arrives late or something goes wrong with the rigging, the window is lost and you wait for the next cycle.
For the diver, this has direct consequences. The task has to be worked out mentally before going in, because there is no time to improvise. Equipment goes down ordered and secured. And communication discipline with the supervisor matters even more than usual, because the decision to abort can come at any moment because of the state of the current, not the state of the work.
Visibility and working method
The water in the southern North Sea and in the inland channels carries a lot of suspended sediment. It is common to work with visibility measured in centimetres, or none at all. That means the work is done by feel, following a physical reference — a guideline, the structure itself, the umbilical — and describing by voice what is found.
A diver trained in clear water usually takes a while to adjust. The key skill isn't visual orientation but spatial memory and method: working the structure in the same direction every time, counting elements, marking positions and never letting go of the reference. In inspection, this translates into reports built from measurements and systematic descriptions rather than photography.
Living alongside the ROV
In this market the ROV is firmly established, especially in wind and cable work. That raises a reasonable question for anyone thinking about training: is there still work left for the diver?
What you see on site is that the split isn't a competition but a division of tasks. The ROV dominates extensive inspection, deep work and anything that means prolonged observation without fine manipulation. The diver remains irreplaceable wherever manual dexterity is needed in confined spaces, hands-on work on structure, unplanned interventions, and anything that requires deciding on the spot with your hands inside the problem. We look at this in more detail in ROV versus diver.
What does happen is that the profile in demand shifts: divers who also understand inspection, data and procedure are increasingly valued, and those who only bring bottom time less so.
Common mistakes made by people arriving from abroad
Assuming your own certification is valid. It's the most expensive mistake. Asking in writing before you move costs one email.
Only looking offshore. The bulk of the steady work is in dredging and hydraulic works. Ruling it out on principle cuts your real options a great deal.
Underestimating the language for the domestic market. You don't need Dutch for the international circuit, but refusing to learn it shuts off half the market.
Arriving without a surface trade. In a sector dominated by industrial contractors, a diver who can also weld, inspect or handle hydraulics gets in sooner. See equipment and tools.
Frequently asked questions
What certification is required to dive professionally in the Netherlands?
The country has its own system of professional diving certificates by category, tied to Dutch labour law. For international offshore work, contractors will usually also accept certifications recognised by IMCA. It's worth confirming with the specific company which combination it requires.
Can you work without speaking Dutch?
On international offshore projects, English is enough and is the usual working language. In civil engineering, domestic dredging and port work, Dutch helps a great deal and is decisive for some positions.
What kind of work is most available?
Dredging and marine construction, maintenance of port and hydraulic infrastructure, support for offshore wind farm installation, and work in the southern North Sea's energy sector.
Is there saturation diving in the Netherlands?
The southern North Sea is a relatively shallow area, so most of the work is surface-supplied diving. Dutch contractors do operate saturation vessels on international projects, though.
Can I come in as an EU diver without any paperwork?
Free movement makes it easier to work, but it doesn't replace the recognition of your diving certificate or the locally required medical. It's a recognition process, not a work permit.
Published 3 September 2026 · By Arthur More, professional saturation diver
Photo: Kecko · CC BY via Openverse