Jeff gained his PhD in solar energy from Cardiff University. He has worked throughout the world specialising in energy policy analysis and evaluation of clean energy technologies. In 1982 he co-founded Energy for Sustainable Development Ltd (ESD). ESD received a Queen’s Award for Export Achievement and was listed in the Financial Times top 50 best places to work in the UK. Since 2011 he has been MD of Bath & West Community Energy and he helped form Mongoose Energy in 2015 where he is Commercial Director.