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30 years of offshore experience

RES has a long history and a broad base of experience in offshore wind, having been involved in the sector since its beginnings in the 1990’s. RES has a deep understanding of the technical, commercial, and operational challenges presented by offshore wind. As well as developing offshore wind farms, RES’ experience is also available to support companies developing, constructing, and operating offshore wind projects. 

RES offers a range of offshore services including long term O&M packages as well as standalone services.

By utilizing our 24/7 state-of-the-art control centre we provide balance of plant (BoP) services, including transmission services for the associated offshore transmission owner (OFTO) assets in the UK.

Did you know?

RES’ first offshore projects were the Lynn and Inner Dowsing Wind Farms (194MW) in the UK consented in 2003.

RES has also developed projects in Northern Ireland and France,  including the St Brieuc Wind Farm (496MW) in Brittany, in a JV with Iberdrola.

RES currently provides O&M services to six OFTOs in the UK.

We have a wealth of knowledge and can support you with site selection, consenting, concept selection, FEED, detailed design, procurement and construction. RES is able to keep sight of the bigger picture, carefully balancing safety, cost, risk and opportunity to find the optimum solution for your project. We can provide consultancy services to support and resolve particular technical challenges, or work as a fully integrated member of your project team.

RES Offshore

Our services

We will work with you to determine the best option to improve the performance and maximise the value of your renewable assets

Development and Consultancy Services

  • Site selection / appraisal
  • EIA management services
  • Post-consent compliance management services
  • Due diligence
  • O&M strategy / OPEX modelling
  • Structural design & civil engineering
  • Geotechnical & geophysical engineering / survey management
  • Front end engineering design


  • UXO risk management
  • Cables
  • WTG package management
  • Interface management
  • Construction support (Project Management and Engineering)
  • Commissioning support
  • Procurement

Operations & Maintenance

  • OFTO/Transmission services
  • Balance of Plant (BoP) / foundation inspections
  • HV maintenance
  • Statutory inspections
  • Subsea inspections & surveys
  • Met mast maintenance
  • Data management
  • Vessels and remotely operated vehicle (ROVs)
  • Marine coordination and weather forecasting

For more information on any of our services please don't hesitate to contact us by emailing Corrine.Barry@res-group.com or completing our contact form below.

Case Studies

Download our brochures

The Future of Energy Podcast

You can find all episodes here

Listen to our 'The Future of Energy' podcast which focuses all things offshore wind. Joined by guests from RES and ORE Catapult, host Maf Smith. How the industry has grown over the last thirty years, and where its headed as offshore becomes a big priority for the International Energy Agency (IEA) in meetings its ambitious targets.

Contact Us

Contact Us