Guy has been a lecturer/tutor on the orthodontic therapy course since its inception in 2009. He also works in specialist orthodontic practice in West Yorkshire. He has been a qualified dentist for over 40 years. He has also been registered as a specialist in orthodontics since 2000. He has published papers on the prevalence of medical emergencies in dental practice, and is the co-author of a textbook on their management. He also had his MSc thesis published in the Journal of Orthodontics.