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(Offshore Diver, Inshore Diver, Surface Supplied Diver, Underwater Welder)
Construction & Trades
Salary
€32,000 - €85,000/yr
Level
Professional
Outlook
Growing
Sector
Construction & Trades
As a commercial diver, you work beneath the surface of the water to carry out construction, inspection, maintenance, and repair tasks on underwater structures such as ports, harbours, pipelines, and offshore energy installations. Your daily work involves using specialised equipment including surface-supplied diving systems, underwater welding tools, rigging gear, and lift bags to complete civil engineering tasks in challenging environments. You follow strict dive plans and health and safety procedures, keeping detailed records of your work and reporting findings to project engineers and supervisors on the surface. You collaborate closely with dive supervisors, marine engineers, and construction crews, and may work in a range of settings from sheltered inshore harbour works to offshore oil, gas, or wind energy platforms. Environmental conditions can be demanding, and maintaining and checking all diving equipment before and after each dive is a core part of the role.
Listen: a day as a Commercial Diver
Your alarm goes off at 05:30 on a grey Tuesday morning in Cork Harbour. You are based on a support vessel contracted to carry out inspection work on the harbour's quay wall and mooring dolphin structures. After a quick breakfast on board, you attend the 06:30 dive briefing, where your dive supervisor runs through the dive plan, the bottom time limit, the emergency procedures, and the weather and tidal window. You sign the dive record sheet, confirming you have read and understood everything. By 07:15 you are suited up in your dry suit, checking your surface-supply umbilical — the armoured hose that carries your breathing gas, communications line, and depth gauge feed from the surface. Your standby diver runs through the buddy checks while the supervisor monitors the panel above. You enter the water from the dive stage at 07:30 as the tide reaches slack water, giving you roughly ninety minutes of workable current.
There is no single Leaving Certificate subject requirement for this career, though Physics, Construction Studies, and Engineering are useful for understanding the technical principles involved. The typical entry route is through an IMCA (International Marine Contractors Association) recognised commercial diving qualification, which is the industry standard accepted in Ireland and internationally, usually delivered at NFQ Level 6. Several private training providers offer recognised programmes such as the IMCA Surface Supplied Diver certification, which covers dive physics, equipment operation, underwater welding, and rigging. Prior recreational diving certification, such as PADI or CMAS, is not a requirement but can be beneficial background experience. Candidates must meet strict medical fitness standards set out in the HSA Diving Regulations before qualifying to dive commercially in Ireland. Ongoing professional development, including specialisms such as saturation diving or non-destructive testing (NDT), is pursued over the course of a career to take on more advanced roles.
Most commercial divers in Ireland begin as trainee or air divers on inshore projects such as port maintenance, bridge inspection, or coastal construction works, building logged dive hours under supervision. With experience and additional IMCA certifications, you can progress to mixed-gas diver or dive supervisor roles, taking responsibility for planning and overseeing operations. Specialisations such as non-destructive testing (NDT), saturation diving, or offshore renewable energy work — particularly relevant given Ireland's growing offshore wind sector — open up significantly higher-paid opportunities. Experienced divers may move into onshore roles as diving supervisors, project managers, or marine operations consultants.
AI-powered remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs) are increasingly used for routine inspection tasks, reducing the need for divers in some straightforward survey roles. However, complex construction, welding, and repair tasks that require human dexterity and judgement in unpredictable conditions remain beyond current robotic capability. AI tools are improving dive planning software, decompression modelling, and real-time monitoring of a diver's physiological status, making operations safer and more efficient. Commercial divers who develop skills in operating and interpreting data from ROVs and underwater technology will be best placed to remain competitive as the industry evolves.
→ Commercial Diver (Current role)
Organisations in Ireland that employ people in this occupation.
Cork Harbour, Co. Cork
Marine construction and dredging projects requiring underwater inspection and work
Dublin Port, Co. Dublin
Offshore wind and marine civil engineering requiring saturation and air diving
Cork, Co. Cork
Specialist commercial diving for harbour, port and pipeline inspection work
Dublin
Underwater construction, maintenance and survey for Irish infrastructure clients
Cork, Co. Cork
Harbour structure inspection and maintenance diving contracted through port authority
Dublin Port, Co. Dublin
Quay wall, berth and infrastructure underwater inspection and maintenance diving
Shannon Estuary / Nationwide
Offshore renewable energy and dredging projects requiring certified commercial divers
Cork / Nationwide
Subsea gas pipeline inspection, maintenance and repair diving operations
Cork, Co. Cork
Seabed survey, geotechnical investigation and offshore diving support services
Naval Base Haulbowline, Co. Cork
Military clearance and inspection diving including ordnance and hull work
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