Company Profile


UMC Managing Director Alan Trevarthen

RszUMC International was formed in 1972 and joined the Vgroup V3 in 2006. In 2009 V.Group acquired the Singapore based inshore diving company Maritime Underwater Maintenance which was subsequently integrated and rebranded into UMC. In 2014 V.Group acquired the SE Asia based offshore IRM company, CORE-IRM, which in-turn was integrated within UMC during 2016 and rebranded as UMC in December 2016.

UMC has built a worldwide network of services specialising in affordable, flexible solutions for all classes of marine, offshore and naval vessels, rigs, platforms, FPSO's/FSO's, marine and mooring units. UMC delivers underwater and afloat Inspection, Repair and Maintenance (IRM) services. In addition, UMC provides marine construction services to ports, terminals and shipyards, as well as the manufacture of hull cleaning equipment and hull aperture blanks, engineering consultancy and project management.

These innovative products and services reduce the need for down time (dry docking, off-hire, decommissioning) resulting in savings of time and cost for our customers.  The support supplied by UMC is tailored to each customer and may involve any combination of design, consultancy, project management, commercial diving, operational maintenance, technology transfer, training and the provision of specialist tooling and equipment.

UMC has operational hubs in Europe, the Middle East and SE Asia.  As a member of the  Oneocean Basic Logo Resized 2network  its footprint is extended to North America and NE Asia.  In addition UMC has a worldwide network of approved partners.  Today, UMC delivers its service in more than 300 locations globally, supporting more than 1,500 assets. 

Company Profile X2

UMC is the preferred supplier of diving services to the fleet of more than 1,000 commercial ships managed by the V. Group and has a further 2,000 commercial vessels under fleet support contracts.  The British Royal Navy and the US Navy are key naval customers and amongst its commercial customers are most of the major international ship owners/operators, ship management companies and oil majors. 

UMC is an approved supplier of underwater survey and maintenance to all of the major global classification societies and works closely with many original equipment manufacturers, notably propeller, thruster and stern seal manufacturers, together with paint suppliers to ensure their products are fitted or applied correctly underwater and afloat.  

UMC is engaged with several major shipyards to help maintain the productive through flow of vessels and to supply afloat underwater inspection and repair services for vessels, rigs and platforms, alongside or at anchor, to compliment dry docking services.

Offshore, UMC specialises in the supply of its own designed and fabricated hull aperture blanks to new build and in-service FPSO’s, drill ships and FSO’s.  It has experience of turnkey project management for afloat jack-up rig spudcans and leg repairs/replacement, ICCP systems, thruster and propulsor repairs and exchange, as well as complex permanent underwater hull plate repairs.  It has supplied these services in the North Sea, Mediterranean, West Africa, Middle East and Far East regions. UMC can also offer topsides inspection, engineering and fabrication services, delivered, where required, using Rope Access Techniques. Class Periodical Surveys, including UWILD, utilise suitably qualified topside and diving personnel to cover 100% of class requirements. UMC can, and have, carried out Hoisting & Lifting Equipment surveys (reported using our online "live" database), Load Testing, NDT services, PRV & Pressure Gauge re-certification, Pipework & Pressure vessel inspection to API standard, Derrick Inspections to API standard and DROPS inspections to DROPS workgroup guidelines. Engineering Design, Fabrication and Management for any project can be provided to client's requirements.

UMC takes regulatory compliance seriously.  It holds ISO 9001:2015 Quality Management Certificate for all operations, ISO 14001:2015 Environmental Management Certificate and ISO 45001:2018 Occupational Health & Safety Certificate for the UK and Far East Operations.  UMC is also a member of IMCA (International Marine Contractors Association) and the national association of diving contractors, in each country in which it is has a permanent operational base.