Guy joined Energy Systems Catapult in 2018 as Director of Strategy and Performance after roles as Energy and Climate Adviser to the Secretary of State for Business, Energy and Industrial Strategy, Greg Clark, and as a Special Adviser to previous BEIS Secretary Amber Rudd. In Government, he was involved in many key decisions, including closing the UK’s coal-fired power stations, greater independence for the electricity system operator, and as an architect of the Clean Growth Strategy.

Before joining Government, he was Head of Policy at energy supplier, OVO Energy and worked at the think tank, Policy Exchange, where he was Head of Environment and Energy. He was previously a journalist, including three years as a foreign correspondent in Hong Kong for the newswire, AFP. He is a non-executive director with UK100, a charity campaigning for greater environmental action by local authorities.

Guy was appointed Chief Executive Officer in June 2022.