Nabil started his career as a dentist after graduating in 1997 from the faculty of dentistry in the Damascus University. After graduation, he pursued a masters in medical and pharmaceutical research from the Vrije Universiteit Brussel (VUB), Faculteit van de Geneeskude en Farmacie before finally achieving a PhD in Dental Sciences at the same University in 2005. He is currently a full professor at the faculty of Dentistry in the Damascus University. In the academic year of 2016–2017, he was assigned to the position of Founding Dean, Faculty of Dentistry at Al-Sham Private University.