Prof Joseph graduated from Saint Joseph University in Beirut. In 2004, he obtained his PhD in biomaterials from the catholic university of Louvain (UCL), Belgium. In 2000 he obtained a master's in operative dentistry (restorative dentistry and endodontics) from UCL. In parallel, he obtained two certificates of advanced studies in biomaterials and operative dentistry from the University of Paris-VII, France, in 1997 and 1998. In 2020 he obtained his HDR degree (Higher Degree of Research) from the Lebanese University, Beirut.

Currently, he is a Professor, former head of the department and director of the master's program of restorative dentistry and Endodontics at a Lebanese university, and the director of several research projects. 

His private practice is limited to aesthetic dentistry and endodontics in Beirut and Brussels.

He has published many papers in international peer-reviewed dental journals and has lectured locally and internationally. He has edited and published a book by Springer entitled ¨Bulk Fill Resin Composites in Dentistry¨. He is a member of: the Academy of Operative Dentistry USA, the editorial board of Reality -Journal, USA, the International Association of Dental Research, and a fellow of the International College of Dentists.