Glen received his DDS from the University of Toronto, Faculty of Dentistry, where he graduated with academic honours. He then moved to Denver, Colorado, completing a certificate program in hospital dentistry, where orofacial trauma was a significant focus of training. Glen next received his certificate in endodontics as well as a Master of Science degree from the University of Detroit Mercy. Glen is a Fellow of The Royal College of Dentists of Canada. The author of numerous publications, Glen continues to lecture at major dental conferences. He has been President of the Toronto Central Dental Society and was recently on staff at the Faculty of Dentistry, University of Toronto.