Lewis is a researcher, educator and campaigner focused on cultural and social transformations, environmental advocacy, and rights of access to the countryside. His research spans environmental and sustainability education, teacher training, and cultures of learning. Lewis works with ‘Lestari Environmental Education Consultancy’ to develop education programmes with Higher Education institutions and integrated evaluation approaches for environmental education organisations. Lewis is a director of ‘On The Hill’ land based learning CIC, a member of Totnes Trespass Group, and works with ‘Right To Roam’ campaigning and advocating for a greater and more equitable access to nature.