Stewart is a green activist turned respected energy consultant and woodland owner. A geographer, he undertook post-graduate management training and ran a local Friends of the Earth (FOE) group from 1979. He was on the national FOE staff in 1984 as energy campaigner during the Chernobyl disaster. He had stints with energy efficiency trade association ACE and then Greenpeace International before running an international energy efficiency charity in Eastern Europe and South Africa. Since then he has increasingly been engaged with the bio-energy consultancy and commercial sector, including stints with boiler installation and fuel companies. He currently runs the Consultancy arm of South East Wood Fuels (SEWF) as well as a bespoke green business film company – One Planet Media. He owns and manages 18 acres of woodland in East Sussex.
He is married with one daughter and a step-daughter, and a recent grand-daughter. For fun he manages and spends time in the woods, sings and also runs a Men’s Group.