Saturation diving in Mexico: Pemex, Campeche and contractors

Published 13 July 2026 · 10 min read · 2,027 words

Mexico concentrates almost all of its offshore activity in a rectangle of sea off Campeche and Tabasco. That's where practically all the country's commercial diving happens: maintenance of fixed platforms, pipeline repair, structural inspection and installation support work. Anyone arriving expecting twenty-eight-day saturation campaigns usually finds something else, and it's worth understanding why before moving any paperwork.

The Sonda de Campeche: shallow water and plenty of structure to maintain

The Sonda de Campeche is a shallow-water area in the southern Gulf of Mexico. Water depths are modest compared with the big saturation hubs: most of the platforms sit between 20 and 60 metres, with the deepest extremes running to around a hundred metres. The Cantarell complex works around 35-50 metres and Ku-Maloob-Zaap around 60.

Ciudad del Carmen is the sector's real logistics base: quays, workshops, contractor offices and the airport through which almost all personnel come and go. Dos Bocas, in Tabasco, handles part of the traffic as well. If someone tells you they're going to work in the Sonda, in practice they're saying they're going to pass through Carmen.

The other fact that defines the market is the age of the installed base. Many platforms have been in service for decades, which generates a steady flow of inspection, maintenance and repair. It isn't a market of big new developments, but of keeping what's already there running.

What that depth means for the diver

At those depths, work is handled almost always with surface-supplied diving: umbilical, helmet, wet or open bell and chamber decompression on deck. Saturation is justified when depth, accumulated bottom time or project logistics make it more efficient than stringing together dives with decompression. In water 40 or 50 metres deep, that sum rarely comes out in favour of setting up a saturation system. If you're not clear on the operational differences, the article on saturation diving frente a surface-supplied diving breaks it down.

Pemex calls the shots: how the work gets shared out

The operator of the vast majority of assets is Pemex. That shapes everything else: work reaches divers through service contracts awarded to contractor companies, who in turn mobilise vessels, equipment and personnel. The diver almost never has a direct relationship with the operator.

The practical consequence is that workload depends on the budget cycle and the pace at which contracts are awarded. When multi-year contracts are running, there are campaigns and there's demand for people. When payments slip or tenders drag on, the effect cascades down to subcontractors and to divers working project by project. It's a market with sharper peaks and troughs than other, more stable destinations.

Opening the sector to private operators has had limited weight in shallow water. It's still a market dominated by one main client, with the advantages and the risks that brings for anyone making a living from it.

Diavaz, Cotemar and the rest of the ecosystem

Two names come up whenever underwater services in Mexico are discussed, and both have local roots. Around them orbits a network of medium and small companies that does much of the actual work.

Diavaz

Grupo Diavaz was founded in 1973 as a diving company, set up by the Vázquez Sentíes brothers, and from there grew into a diversified group with business in offshore oil services, onshore services, and gas and energy distribution. Its marine division handles inspection, maintenance and repair of oil structures and installations in the Sonda, and is a regular Pemex contractor.

For a diver, what matters is that Diavaz keeps its own diving capability and doesn't just manage projects. That means technical staff, equipment and recurring campaigns.

Cotemar

Cotemar has operated in the Gulf of Mexico since 1979, based in Ciudad del Carmen, and its strength is its fleet: accommodation and dynamic-positioning semi-submersibles, support vessels, barges and cranes, crew transfer boats and units with diving capability. It works mainly in platform maintenance and construction, with diving as one piece within broader service packages.

That profile explains something about the Mexican market: diving is sold bundled with scaffolding, topside welding, accommodation and marine logistics, not as a standalone specialty.

The rest of the fabric

Below the big players there are Mexican industrial diving companies working as subcontractors, and international companies that come in on specific projects, mobilising their own vessels when the scope calls for it. If you want an idea of who's active and with what resources, the company directory gives you a starting point for cross-checking names before sending a CV in blind.

Is real saturation diving done in Mexico?

Yes, but it's the exception, not the norm. Saturation systems turn up tied to specific projects: pipeline work in the deeper part of the Sonda, long campaigns where repeated decompression time gets expensive, or scopes where the operator contracts a vessel with a system already installed. The bulk of the day-to-day volume, though, is surface-supplied diving.

That's the essential difference from markets where saturation is routine. If your goal is racking up bell days, Mexico isn't the natural destination: it's worth checking where that activity is concentrated and with what resources in the guide on where saturation diving work is found, and checking which units have a system in the listing of dive support vessels.

That said, Mexico is a genuinely interesting market for building up surface hours, mixed-gas experience and real field work, which is what later lets you make the jump elsewhere.

The real work: what happens underwater

The task list is recognisable to anyone who has worked shallow water on fixed structures. Nothing exotic, plenty of repetitive work and constant physical demand.

• Visual inspection and NDT on the legs, nodes and bracing of fixed structures.
• Cleaning marine growth to leave the surface fit for inspection or repair.
• Inspecting and replacing sacrificial anodes, including retrofit installations on older platforms.
• Pipeline repair and stabilisation: supports, exposed sections, flanges and connections.
• Installing clamps and structural reinforcements, with the rigging and positioning that involves.
• One-off underwater cutting and welding, and support for lifting and rigging work.
• Riser inspection and work in the splash zone, usually the most uncomfortable part of the scope.

Conditions aren't those of a training tank. There's current, visibility changes from one day to the next and swell makes the splash zone harder to work. In summer there's considerable heat on deck, and the northerly-wind season sets the window that campaign planning has to work around.

Certifications and paperwork required

The Mexican legal framework for work under pressure is NOM-014-STPS-2000, which sets safety and health conditions for workers exposed to abnormal ambient pressures. On top of that framework, contractors rely on international technical standards, and in the Gulf of Mexico the usual reference is ADCI, with the ANSI/ACDE consensus standard as the technical baseline.

• Recognised commercial diving certification: ADCI is the most cited in this market; ADAS and HSE are also accepted depending on the company and scope.
• A current diving medical, issued by a doctor trained in underwater and hyperbaric medicine.
• Maritime documentation to join a vessel: seaman's book and a certificate of psychophysical fitness when the post requires it.
• Sea survival and helicopter escape training, plus whatever safety training the client or contractor requires.
• An up-to-date dive log, with hours and depths verified.

If you're coming from Europe and aren't sure which school and which ticket to get first, compare before you pay: the certification map and the breakdown of HSE, IMCA and ADCI save you from taking a course that later turns out to be no use in the area where you want to work.

Local hiring versus foreign hiring

The Mexican market is markedly local. Most diving posts are filled with national personnel, trained at schools in the country and with a network of contacts in Ciudad del Carmen. A foreigner competes at a disadvantage on cost and paperwork: a work permit, practical recognition of the qualification and fitting into the company's hiring structure are all needed.

Language isn't a minor detail. Briefings, permits to work, communication with the supervisor and much of the documentation are handled in Spanish. For a Spanish speaker that's a clear advantage over other destinations, although technical English remains useful whenever an international contractor comes in.

The realistic route for a foreigner is to bring something that isn't abundant locally: an LST, supervisor, qualified hyperbaric welder or ROV technician profile. With an entry-level diver profile, the odds are low. And it's worth adjusting your financial expectations: rates are clearly below those of the North Sea, as you can see by comparing ranges in the guide on how much a diver earns.

How to position yourself if Mexico interests you

If the Mexican market fits your situation, the path is fairly concrete. Training with ADCI recognition, a diving medical in order, and then a physical presence: in this sector, work is found by being near the quay and being known, not by sending emails from another continent.

Starting with port work, marine civil engineering or inland-water inspection is a reasonable way to build up hours while you make a name for yourself. From there, the door to offshore campaigns opens through word of mouth. It's worth regularly checking job listings in the sector to understand what profiles are being sought and with what specific requirements.

In short: Mexico offers a steady volume of surface work in shallow water, with one dominant client and solid local contractors. It's a good place to build a trade and a poor place to chase saturation days. Knowing that going in makes the decision much easier.

Frequently asked questions

Published 18 August 2026 · By Arthur More, professional saturation diver

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