University of Vienna and private practioner in Vienna, Austria

• 1970 MD degree, Medical School, Univ. of Vienna 1973 Speciality board examination in dentistry (DDS) Residency at Dept. of Oral an Maxillofacial Surgery, University of Vienna
• 1978 Residencies at Neurosurgery and ENT Department, University of Vienna
• 1979 Speciality board examination in Oral and Maxillofacial Surgery Appointed senior resident
• 1982- Head of Dept. of Oral Surgery, Dental School, Univ. of Vienna
• 1983- President of the Austrian Society of Oral Surgery and Implantology
• 1987-1989 Head of the Dental School of the University of Vienna
• 1989-1993 President of the Austrian Society of Dentists and Stomatologists
• 1991 Honorary member of the Hungarian Society of Dentists and Stomatologists
• 1994-1997 Visiting Professor at the University of Pennsylvania
• 1998- Head of the Dental School of the University of Vienna
• Author of 7 textbooks and over 200 publications.