Most of Ken's working life has been in education, either formally as a secondary school teacher, a lecturer in higher education or as an educational consultant developing educational resources and programmes internationally. He was significant in the development of contemporary ideas around the circular economy and was Head of Innovation for the Ellen MacArthur Foundation (2010-2018). Ken is currently a Visiting Fellow at Cranfield University and a member of the Club of Rome's 21st Century Transformational Economics Commission. He is author of a number of books including Circular Economy: A Wealth of Flows (2017), The Wonderful Circles of Oz (A Circular Economy Story) with Alex Duff (2021) and Sense and Sustainability (2009) with Craig Johnson. Ken holds that education and critical thinking are central to all constructive change.