Commercial Diver
Dive professionally to inspect, repair, and install underwater structures for offshore energy, civil engineering, and marine construction projects.
High
Moderate
3–6 months for initial HSE Part I/II diver training; 1–2 years building experience before offshore/saturation roles
HSE Part I (Scuba) or Part II (Surface Supplied) DSAT certificate; IMCA certification for offshore work
common
What you do
Commercial divers carry out underwater work that land-based trades cannot reach — inspecting bridge foundations, repairing harbour walls, installing subsea pipelines, maintaining offshore oil and gas platforms, and supporting offshore wind farm construction. Entry requires HSE-approved diver training to DSAT (Diving Standards Assessment Team) standards, typically a Part I (Scuba) or Part II (Surface Supplied) certificate from an approved school such as The Underwater Centre (Fort William), Divex, or South Devon UTC. Inshore divers work in harbours, rivers, reservoirs, and coastal waters on civil engineering and inspection contracts. Offshore divers work from dive support vessels on oil and gas or renewable energy projects, often using surface-supplied diving equipment with hot water suits and voice communications. Saturation divers live in pressurised chambers for weeks, working at extreme depths. IMCA (International Marine Contractors Association) certification opens international offshore work. Many divers hold additional qualifications in welding (coded welder), NDT inspection, or ROV piloting.
Why this career is resilient
HSE Diving at Work Regulations and IMCA standards require qualified human divers for underwater inspection, repair, and installation work. While ROVs (remotely operated vehicles) handle some survey and observation tasks, the dexterity, judgment, and adaptability needed for hands-on repair, welding, cutting, and rigging in unpredictable underwater environments cannot be replicated remotely. The growth of offshore wind farm construction and ongoing maintenance of ageing subsea infrastructure creates sustained demand. Every dive requires real-time human decision-making on safety, conditions, and task execution.
A typical day
An offshore dive day begins with a toolbox talk and dive plan briefing — reviewing the task, depth, bottom time, and emergency procedures. You kit up in a hot water suit, check surface-supplied equipment, and enter the water from a dive basket or bell. Underwater, you carry out the task — perhaps inspecting a pipeline joint, fitting an anode, or cutting a corroded section — while communicating continuously with the dive supervisor on the surface. After surfacing, you debrief, complete dive logs, and maintain equipment. Inshore days follow a similar pattern but from a small workboat or pontoon.
Routes in
Full-time college course
Study full-time at a further education college, usually for 1–2 years. You will need to fund yourself or apply for a student loan (available for Level 4+ courses).
Employer-funded training
Some employers — particularly the NHS, emergency services, and larger care providers — run their own funded training programmes. You apply for a job and train as you work.
Pay and costs
Earning potential: Inshore commercial divers earn £25,000–£40,000. Offshore air divers: £40,000–£70,000. Saturation divers: £80,000–£150,000+. Rates are typically day-rate based (£150–£350 inshore; £300–£800+ offshore). Work can be seasonal or project-based with gaps between contracts.
Training costs: HSE Part I (Scuba) course: approximately £3,000–£5,000. HSE Part II (Surface Supplied) course: approximately £8,000–£15,000. IMCA certification and offshore survival (BOSIET): approximately £1,500–£2,000. Medical (HSE diving medical): approximately £150–£250. Total investment for offshore-ready diver: £12,000–£20,000. No employer-funded route — self-funded training is the norm.