Specialist service provider in IRM and Offshore Construction using specialized subsea equipment and competent personnel for deep sea saturation diving, air/mixed gas diving, ROV operations, Survey.

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With over 60 years of expertise in civil underwater construction and maintenance, we stand as premier specialists in the field. Our proficiency extends to tunneling, caissons, sluices, and we have significant experience in underwater concreting. Our offerings are further diversified with port construction services, inclusive of vessel maintenance. Supported by our highly qualified personnel, we consistently deliver unparalleled assistance through our comprehensive fleet of diving support vessels and equipment spreads.

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Specialist service provider in maintenance, repair and construction at hydropower dams with a special focus on engineering, sediment removal, plug/bulkhead/stop log fabrication and installation, emergency repairs. All with the use of specalist dredging and air/saturation deep dive systems.

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With its hyperbaric and wet test centre DCN can offer its clients a wide range of services from testing components to conduct welding qualifications and much more.

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Introduction to DCN Diving


DCN Diving, established in 1957 (as Vriens Diving), has over 60 years-experience in subsea operations. It is a family owned company with its head office based in the Netherlands Bergen op Zoom and supporting subsidiaries and branch offices in Belgium, Germany, UAE, Malaysia and Singapore.

DCN Diving operates as a world-wide subsea service contractor and is an IMCA member for Surface supplied diving, Saturation diving and ROV operations. DCN Diving is specialized in:

  • Hyperbaric welding and hyperbaric testing using specialized in-house experience and equipment including its Hyperbaric Test Facility in Bergen op Zoom
  • Creating dry space underwater with the use of habitats, cofferdams, bulkheads and more
  • Subsea rehabilitation of hydropower dams
  • Underwater concreting and other civil works
  • Pipelines installation dive support
  • Subsea support in the renewable energy sector
  • Vessel Inspection and Maintenance
  • Offshore subsea Inspection Repair and Maintenance (IRM)

DCN is certified according to ISO 9001:2015, ISO 14001:2015, ISO 45001, SCC**, SCL and FPAL and has various certificates (ABS, Lloyds, KR, Bureau Veritas, Rina, DNV-GL, RMS and NK class) for In-water Survey and has class certificates for its Surface Supplied and Saturation Diving systems.

Our Recent Projects and Updates

For a full overview, click here.

Exciting Update on the Ituango Dam Project!

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Successful Installation Mechanical Bulkheads We are filled with pride and excitement to announce a significant milestone in our ongoing project at the Ituango Dam. With precision and expertise, our team…

De Toekomst van Veilig Duiken

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De Toekomst van Veilig Duiken DCN had de eer om gastheer te zijn voor Rijkswaterstaat tijdens de kennisuitwisselingsdag ' De Toekomst van Veilig Duiken'.Rijkswaterstaat heeft in 2022 het kader ‘Veilig…

Cergas Manpower Supply

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Cergas Manpower Supply We are thrilled to announce that Cergas Manpower Supply has joined the DCN Diving group of Companies and is now part of the DCN family! A game-changer…

Offshore Achievement Awards

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Offshore Achievement Awards We, at DCN Diving UK Ltd., are delighted to announce that we have been awarded the Highly Commended certificate at the prestigious Offshore Achievement Awards for the…