Environmental Sciences graduate John Twitchen has spent the last 30 years in and around the waste and resources sector and is a Fellow of the Chartered Institution of Wastes Management. After working in the sector, John set up one of the first specialist environmental communications consul-tancies in the UK. Recently he set up circular economy start-up Stuff4Life focused on polymer circu-larity, with the company nominated for The Earthshot Prize 2024. John is also a founder of circulari-ty start-up Xeroc working with colleagues from across the materials and resources sectors to devel-op 'concrete as a service'. In his spare time he is a presenter on YouTube channel BMX Race Hub.