Leading offshore & marine support companies in Singapore

The companies

1. Vallianz Holdings Limited Featured

   Vallianz Holdings charters and manages a fleet of 74 offshore support vessels for oil, gas and offshore-wind operators, and builds and repairs vessels through its Batam shipyard. The SGX Catalist-listed group reported revenue of US$332.3 million and profit attributable to owners of US$10.7 million for the financial year ended 31 December 2025, working across seventeen territories from the Middle East to the Gulf of Mexico.

   • Offshore support vessels and salvage
   • 1 Pasir Panjang Road, #28-02 Labrador Tower, Singapore 118479

2. BeeX

   A homegrown autonomous-underwater-vehicle developer providing subsea inspection at offshore wind farms.

   • Offshore wind and marine renewables

3. Britoil Offshore Services

   A homegrown OSV owner with a large self-reported fleet — 21 anchor-handling tugs, 32 AHTS (DP-2), 22 PSVs plus MPSVs — serving oil-and-gas and renewables.

   • Offshore support vessels and salvage

4. Commercial Diving Services

   A Singapore underwater-services provider: hull inspection and cleaning, propeller polishing, underwater hot works and repairs, salvage and recovery and MPI inspections, serving owners, charterers and agencies across Singapore and South-East Asia.

   • Offshore support vessels and salvage

5. Franklin Offshore International

   A Singapore-headquartered integrated provider of rigging, mooring and lifting equipment and services — subsea equipment, wire rope, buoyancy and mooring solutions — supporting FPSO and floating-production and offshore installation and OSV operations. ISO 9001/14001/45001.

   • Offshore support vessels and salvage
   • ISO 9001
   • ISO 14001
   • ISO 45001

6. Geonamics

   A Singapore marine soil-investigation and geotechnical-testing firm supporting offshore-wind foundation design across ASEAN, with 1,000-plus marine boreholes reported.

   • Offshore wind and marine renewables

7. International Marine Ind Diving (IMID)

   A Singapore professional diving-contractor consortium for marine construction and subsea engineering: pile restoration and anode installation, fabrication and installation, ship inspection-repair-maintenance, salvage and recovery, and ROV services. ISO 9001/14001/45001 with class-society approvals.

   • Subsea engineering
   • ISO 9001
   • ISO 14001
   • ISO 45001

8. Kim Heng Limited

   An SGX-listed offshore-and-marine services contractor with two Singapore yards (Pandan Crescent and Penjuru Road, about 205 m combined waterfront). It provides EPCI support, marine construction and heavy steel fabrication, rig repair and drilling support, afloat and drydock ship repair, retrofitting and conversion, and offshore chartering — and self-builds locally-flagged crew-transfer vessels for offshore wind, including horizontal directional drilling for subsea-cable installation.

   • Offshore support vessels and salvage

9. Master-Tech Diving Services

   An IMCA-certified commercial diving contractor (400-500 deployments a year) for underwater inspection, class-approved UWILD accepted by ABS/DNV/LR/BV/RINA/ClassNK/IRS, hull cleaning, propeller polishing, underwater welding and cutting, and ROV inspection; supports pipeline installation, cable laying and platform work. ISO 9001/14001/45001.

   • Subsea engineering
   • IMCA
   • Marine classification approval
   • ISO 9001

10. Mencast Holdings

    An SGX-listed offshore-and-marine group. Its Offshore & Engineering arm fabricates and maintains structures — skids, filtration systems, pressure vessels and storage tanks — with rope-access services; its Marine arm is a long-established sterngear, propeller and CPP-blade reconditioning and bronze-casting specialist, covering propeller-shaft work and dynamic balancing in-house and on-site at shipyards, anchorages and onboard; and an Energy Services arm handles tank de-sludging and hydro-cleaning.

    • Subsea engineering

11. Mooreast Holdings

    A homegrown SGX-listed specialist in mooring systems and anchors, increasingly focused on floating offshore wind; secured a floating-wind anchor order in France and is quadrupling capacity via a roughly 98,919 sqm ex-Seatrium facility.

    • Offshore wind and marine renewables

12. PACC Offshore Services (POSH)

    A homegrown Kuok-group OSV owner-operator running AHTS to 200-tonne bollard pull / 7,000 BHP, platform supply vessels, and DP3 semi-submersible and DP2 accommodation (walk-to-work) vessels among the world's largest; MPA-licensed for Singapore harbour towage, with subsea and offshore-wind support scope.

    • Offshore support vessels and salvage

13. Pacific Radiance

    A homegrown SGX-listed OSV group offering AHTS and PSV chartering and subsea and support services, rebuilding post-restructuring.

    • Offshore support vessels and salvage

14. Promor

    A Singapore offshore-engineering house specialising in mooring systems (turret, spread mooring, CALM buoys) and FPSO and FSO detailed-design engineering — hull structure, riser balconies, riser and subsea-system interfaces, swivels and offloading systems.

    • Subsea engineering

15. Singapore Salvage Engineers

    A homegrown salvage, diving and marine-support contractor operating 60-plus support craft (crane and work barges, tugs, multicats, dive boats, pollution-control craft) with towing, diving, heavy lifting, mooring, anchor-installation and subsea support capability, performing wreck removal, cargo recovery and pollution control.

    • Offshore support vessels and salvage

16. Synergy Marine

    A Singapore commercial-diving contractor delivering underwater inspection and surveys, marine construction (wharves, jetties, pontoons), underwater pipeline solutions, mooring and buoy services, and underwater cutting and welding.

    • Subsea engineering