The Renewable Energy Consultants

The Renewable Energy Consultants.

OWC – an ABL Group company – combines a legacy in offshore wind, multi-disciplinary engineering expertise and market experience across renewable energies offshore and onshore, to support the commercial development of wind power, solar PV, hydrogen and energy storage solutions with the most comprehensive technical offering in engineering, consultancy and advisory.

Offshore Wind
Onshore Wind
Floating Solar
Energy Storage

Our Experience


Offshore Wind Projects


Floating Wind Projects


Solar PV Projects


Battery Energy Storage (BESS)


Hydrogen Projects

Delivering scalable Renewable Energy from concept to operations

Discover our experience across the sectors

Our Services

Market Studies

Market Studies

Supporting in early-market studies, site identification & characterisation, market regulations, and route-to-market strategy.
Technical Studies

Technical Studies

Offering a vast range of technical expertise to provide clients with technical studies in almost every area of interest.
Owner’s Engineering

Owner’s Engineering

Our owner’s engineering ensures your project runs on time, on budget and according to your objectives.
Technical Due Diligence

Technical Due Diligence

Specialist technical due diligence supporting the financing, acquisition, sale and refinancing of assets, technology and companies within the renewable energy market.


OWC draws on a vase range of engineering expertise to provide you with specialist engineering and analysis across every stage of a renewable project’s lifecycle.


Dedicated multi-disciplinary geoscience team covering geotechnical, geophysical, geospatial engineering, supporting renewable energy projects in understanding and mitigating their ground risks.
Research and Development

Research and Development

Innosea – the French branch of OWC – is a leading research & development (R&D) partner across the marine renewable energy landscape.

Part of ABL Group – Energy, Marine, Engineering & Digital Solutions

OWC is part of ABL Group – the global consultancy delivering energy, marine, engineering and digital solutions to drive safety and sustainability in energy and oceans. This enables us to work with all types of stakeholders across the renewable energy value chain, providing technical and advisory solutions to drive optimisation and safety at every stage of a project or asset’s lifecycle.

Le Grand Entretien avec Hugues Delanoue, Managing Director ABL Group France.

ABL Group 6 December 2021 11:04

The Energy & Marine Consultants. ​

Global, independent energy, marine and engineering consultant working to de-risk and drive sustainability across projects and assets in renewables, maritime and oil & gas. ​

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The Renewable Energy Consultants. ​

Engineering technical consultancy and support services by being a specialised player in offshore renewable energies.

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The Engineering Consultants. ​

Independent engineering, design and analysis consultants working across marine markets: renewables, oil & gas, maritime, small craft and defence, and infrastructure. ​

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Where we are

OWC is headquartered in London, with an expanding global presence. Part of ABL Group – leading international marine and energy consultants – OWC works across the group’s extensive global footprint in more than 39 locations in Europe, the Americas, Asia-Pacific, the Middle East and Africa.

Work with us

At OWC, we are continually recruiting talented people with a passion for driving the global energy transition. Find out more about our career opportunities for students, graduates, engineering professionals, business development and others. 

The ABL Group Engineer Development Programme 

September 2024 intake

Your fast-track to a career in renewable energy, maritime or oil & gas. 

Apply for a place on our accredited 4-year international engineering graduate scheme. What we offer: 

  • Opportunity to work abroad and with global teams
  • Experience across different market sectors fields
  • Chance to apply your knowledge to developing real solutions for change 

Applications for the September 2024 intake open on October 23rd and close January 2024. 

Companies in the ABL Group EDP Programme:

OWC logo
Longitude logo


Blogs and Insights

Australia Offshore Wind Market Overview

Australia Offshore Wind Market Overview

Jul 12, 20232 min read
Australia is discovering its offshore wind power roadmap. OWC’s experts dive into Australia’s Offshore Wind potential in a series of bitesize blogs
Green Hydrogen in Asia

Green Hydrogen in Asia

May 18, 20237 min read
A supply chain ready to serve Hydrogen is becoming big business, the urgency to invest in hydrogen projects today is greater than ever. A report by the Hydrogen Council suggests that $700bn USD of investment in green hydrogen solutions will be required through 2030 for countries committed to achieving net zero emissions by 2050  – […]
Europe’s Offshore Wind Tenders: Important dates for your diary

Europe’s Offshore Wind Tenders: Important dates for your diary

Apr 25, 20236 min read
Europe is becoming a wind powerhouse, with wind accounting for 15% of Europe’s electricity supply. So what is the current pipeline for offshore wind in Europe?
Safety in Numbers: Benefits of Portfolio Diversification in Renewable Energy Investment

Safety in Numbers: Benefits of Portfolio Diversification in Renewable Energy Investment

Apr 17, 202310 min read
Owning and operating a single renewable asset, such as a wind farm, can prove to be risky for investors. Factors such as variable site conditions, seasonality (and, by extension, climate change) can all translate into an unstable and unpredictable return on investment. Those looking to enter the ring might consider diversifying their portfolio of assets in order to reduce financial risk.  
Meet the Team: Vasilis Markatselis | OWC London

Meet the Team: Vasilis Markatselis | OWC London

Jan 16, 20233 min read
The team at ABL Group shares the passion, vision and values for working in energy and the world’s oceans, de-risking and driving the energy transition. We are driven by the idea that the best work is born from professionalism, diligence… and fun. You know ABL Group, but do you know our team? Vasilis Markatselis, Senior Consultant, OWC […]
The Case of California: $757m Auction closes with Offshore Wind Winners

The Case of California: $757m Auction closes with Offshore Wind Winners

Jan 4, 20239 min read
With California’s seabed leasing auction concluded, OWC investigates the challenges ahead in terms of grid interconnection, port infrastructure and financial viability.

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