1. Assistant Head of Clinic, Department of Restorative and Aesthetic Dentistry, Lebanese University, Beirut, Lebanon
2. Clinical Chief Assistant, Department of Restorative and Aesthetic Dentistry, Lebanese University, Beirut, Lebanon
3. Associate Professor, Department of Restorative and Aesthetic Dentistry, Lebanese University, Beirut, Lebanon
4. Head of Clinic, Department of Restorative and Aesthetic Dentistry, Lebanese University, Beirut, Lebanon
5. Emeritus Professor, University Dental School and Hospital, Wilton, Cork, Ireland ()