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 consultancies in the UK. Recently he set up circular economy start-up Stuff4Life focused on polymer circularity, with the company nominated for The Earthshot Prize 2024. John is also a founder of circularity start-up Xeroc working with colleagues from across the materials and resources sectors to develop 'concrete as a service'. In his spare time he is a presenter on YouTube channel BMX Race Hub.