Dr Ounsi graduated from the school of dental surgery, University of Montpellier, France. He holds a masters 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.

Dr Ounsi is a member of the Research Department at the Lebanese University and holds private practices in Kuwait and Lebanon.

He is also a visiting professor at the Tuscan School of Dentistry and a research associate at the Eng AB Chair for Growth Factors and Bone Regeneration at King Saud University in Saudi Arabia. He is a fellow of the International College of Dentists, a member of the American Association of Endodontists, the International Association for Dental Research and of the Royal Australasian College of Dental Surgeons – Endo Stream.

Dr Ounsi is also a member of the scientific advisory boards of several major endodontic and dental journals. He authored and co-authored more than 40 publications, and presented and conducted more than 150 lectures, conferences, and courses in 5 continents.