2020 - present Advisor to the European Commission
2019 - present Editor-in-Chief of the Journal of Cranio-Maxillofacial Surgery
2014 - present Professor and Head of the Department of Oral and Maxillofacial Surgery, Medical University of Vienna, Austria
2014 - Professor and Head of the Department of Oral and Maxillofacial Surgery, Halle University Hospital, Germany
2009 - 2014 Full Professor of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Germany
2004 - 2009 Associate Professor of Oral and Maxillofacial Surgery, University of Erlangen-Nuremberg, Germany

2004 Regional Plastic and Reconstructive Surgery
2004 Certified Area of Expertise: Implant Dentistry
2004 Oral Surgery
2001 Oral and Maxillofacial Surgery

Orthognathic surgery
Implant dentistry
TMJ surgery
Salivary gland surgery
Cleft lip and palate surgery
Craniofacial Surgery
Tumor surgery of head and neck
Treatment of medication related osteonecrosis
Microvascular reconstruction
Distraction osteogenensis