Mark worked as the Deputy Regional Medical Director for NHS England - Midlands and East. There he was part of the team leading the GP Forward View in the region, and was regional lead for the National Diabetes Prevention Programme. Previously he was a GP in St Ives, Cambridgeshire for 17 years.
At the start of his medical career he spent five years in General Medicine and five years in Public Health Medicine. He has experience of being a GP trainer, a NHS England Responsible Officer, and a GMC Performance Assessor. He has also been Vice-Chair and Treasurer of the East Anglia Faculty of the Royal College of General Practitioners.