Prof. Ounsi graduated from the school of dental surgery, University of Montpellier, France. He holds a post-graduate degree in endodontics, a master in medical and biological sciences, a research master in oral biology from Saint-Joseph University in Beirut where he taught endodontics, and a PhD in Dental materials from the University of Siena. Prof. Ounsi is presently an assistant professor at the department of restorative dentistry and endodontics of the Lebanese University and a visiting professor at the department of endodontics and restorative dentistry of Siena University. He is the editor of the International Journal of Oral and Dental Sciences, the former editor of the Arab Dental Journal, and an associate editor of the Lebanese Dental Journal, Journal of Contemporary Dental Practice, and the International Journal of Endodontic Rehabilitation. He also serves on the scientific advisory board of the Journal of Endodontics and the Saudi Endodontic Journal, and he is a reviewer for the Journal of Endodontics, International Endodontic Journal, Dental Traumatology, Journal of Applied Oral Science, and the Open Dentistry Journal. He is a fellow of the International College of Dentists and a member of the European Society of Endodontology and the American Association of Endodontists. He authored and co-authored more than 50 publications, and presented and conducted more than 200 lectures, conferences, and courses in 4 continents.