Subsea Diving Contractor

Allseas

Provides offshore construction and subsea installation capabilities, including remotely operated systems and specialized subsea equipment.

Châtel-Saint-Denis, Switzerland

Bibby Offshore

Provides subsea construction, inspection, repair, and maintenance services for the offshore energy sector.

Aberdeen, United Kingdom

Deep Ocean

Ocean services specialist providing subsea surveys, engineering, project management, installation, maintenance, and recycling for oil and gas and offshore renew

Haugesund, Norway

DOF Group

Delivers integrated marine and subsea services for fixed and floating offshore wind, including cable installation, transport, mooring, repair, and maintenance.

Bergen, Norway

Fugro

Provides geo-data services, including marine site characterization, geophysical and geotechnical surveys, and inspection services for offshore energy and infras

Leidschendam, Netherlands

Helix Energy Solutions Group

Provides rigless **subsea well intervention** and offshore well management services, including campaign-based intervention and late-life well work.

Houston, United States

McDermott

Engineering, procurement, construction, and installation contractor for offshore energy and subsea infrastructure projects.

Houston, United States

Mermaid Subsea Services

Provides subsea engineering and construction services for the offshore oil and gas industry.

Bangkok, Thailand

N-Sea

Subsea services provider with a dedicated survey arm delivering hydrographic, geophysical and geotechnical survey work, plus UXO and inspection support.

Rotterdam, Netherlands

Ocean Installer

Subsea engineering and installation contractor focused on offshore energy projects, including subsea construction and field development.

Stavanger, Norway

Oceaneering

Manages client-owned subsea tooling and provides refurbishment, upgrades, and maintenance support for offshore systems.

Houston, United States

Seamec Limited

Provides offshore diving, subsea construction support, and marine services for oil, gas, and infrastructure projects.

Mumbai, India

Subsea Global Solutions

Provides port and marine inspection services including seabed surveys, corrosion surveys, ROV inspection and planned maintenance for large ports and harbours.

Miami, United States

Unique Group

Subsea engineering and rental company providing decommissioning tools and systems for cutting, removal, recovery, and offshore asset retirement.

Gibraltar, Gibraltar