Dr Stewart is a GP in South Devon as well as CEO and co-founder of Watercress Research Ltd. He holds an Honorary Clinical Associate Research Fellowship in Theoretical Medicine at The University of Exeter, alongside an NHS England Clinical Entrepreneur Fellowship, and a separate Mid Essex, Southend & Basildon Medical Innovation Fellowship. He is the President of Torbay & District Medical Society and came runner-up in 2019’s National GP Trainee of the year award. He has a consultancy company, and works as an out of hours GP for Devon Docs as part of the 111 service.