Melanie Onn joined RenewableUK in March 2020 as Deputy Chief Executive. Her role includes helping RenewableUK's supply chain members to grow, and developing the skilled workforce the industry needs, including opening up wider areas of the sector to more women. She also leads on public speaking and media work. Ms Onn was elected twice as Labour MP for Great Grimsby, serving from May 2015 to November 2019, including periods as Shadow Minister for Housing, Communities and Local Government and Shadow Deputy Leader of the House of Commons.

Clark MacFarlane is both Managing Director of the UK business, a position he has held since 2014, and CEO of the Onshore Business across Northern Europe and the Middle East, as of 2020. Clark joined the then Siemens Wind Power business as Managing Director, Offshore in 2012. Since joining Siemens in 1997, Clark has been the CEO or MD of five Siemens UK Businesses covering Power Generation and Services, Defence, Building Technologies and IT Solutions & Services. Clark has been a board member of RenewableUK since 2017 and is also a member of the Offshore Wind Industry Council (OWIC), working with his Industry Colleagues and BEIS to achieve a cost-effective, long-term future for sustainable renewable energy in the UK and develop the Supply Chain. Clark’s background is in Mechanical Engineering, along with an MBA, and prior to joining Siemens, he spent 15 years working in the Energy Sector.