Dr. Marc Factor received his specialty training in Endodontics in 1995 from SUNY at the Buffalo School of Dental Medicine, paired with a Masters of Science in Oral Biology.

Dr. Factor has served on the executive council of Alpha Omega Dental Society and has held an Attending Staff position at Mount Sinai Hospital, where he gave lectures and assistance to dental residents.

He is involved in continuing education organizations, including the George Hare Endodontic Study Club, the Ontario Society of Endodontists and the American Association of Endodontists. 

Dr. Factor has taught at the University of Toronto as an undergraduate clinical instructor and was President of the York Region Dental Society.