Dimitrios graduated in Budapest, Hungary before continuing their studies as a fellow in restorative dentistry at the Harvard School of Dental Medicine, gaining new skills and experience in prosthodontics. They then returned to Dimitrios's country of birth, Greece, where they ran their own private practice in Athens for around 11 years. During that time, Dimitrios was a member of a team of specialists, often undertaking complex treatments involving periodontics, orthodontics and implant dentistry.