With our specific marine engineering expertise, intimate understanding of marine processes, optimum location for marine based projects and extensive experience in this emerging and fast growing sector, Mainstay Marine Solutions is a partner of choice for marine energy device fabrication projects.

Not only do we have the skills and technical requirements for building large scale submersible and semi-submersible marine structures, we can also support and facilitate the design and project management process to ensure devices are delivered on time, to budget and to the highest quality.

Our capabilities are showcased in; building and fabricating the 200 tonne, 20m high, 400kw DeltaStream demonstration device for Tidal Energy Ltd; building the first stage of an innovative wave energy converting device for our client ‘Wave-tricity’ , delivering the Offshore Support Vessel Dart Fisher in 2014; and the BMT Nigel Gee designed 20m Wind Farm Support Vessel for Turbine Transfers in 2015.

Our competencies include; design optimisation, welding and fabrication, mechanical and electrical engineering, marine coatings and blasting, drive train alignment, balancing and project management.


The Welsh coastline has some of the best wave and tidal stream resource in the world with potential to deliver 6.4 GW of installed capacity. Mainstay Marine Solutions are well placed in the Milford Haven Waterway to support businesses investing in this central hub for Marine Energy.

With the designation of two demonstration zones, seabed agreements in place for 3 separate tidal projects and a number of proposals for tidal range projects, Wales has the potential to become a world leader in the Marine Energy market.

For more information on the sector, visit the Marine Energy Wales’ website by clicking here.