Prof. Ounsi graduated from the school of dental surgery, University of Montpellier, France. He holds a master in endodontics, a master in medical and biological sciences, a research master in oral biology from Saint-Joseph University in Beirut, 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 serves on the editorial boards and scientific advisory boards of journals such as the Journal of Endodontics and the Saudi Endodontic Journal, and reviews for International Endodontic Journal, Dental Traumatology, Journal of Applied Oral Science, and the Journal of Contemporary Dental Practice. 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 and courses in 4 continents.