Following several years in general dental practice, Dr Lewis spent 27 years at Dental Protection, including as Dental Director between 1998 and 2016, and served on the Council and Executive of the Medical Protection Society. He is Consultant Editor of Dentistry and a Special Consultant to BDA Indemnity. He recently demitted office after five years as a Trustee of the College and founder member of its predecessor Transition Board. He has been awarded Honorary Membership of the British, Irish and New Zealand Dental Associations, and of the British Society for Restorative Dentistry, and is a Fellow of the Faculty of Dental Surgery of the Royal College of Surgeons of England.