1987 Graduation from Medical School, University of Innsbruck 1987 Visit of the Studio City Dental Group, North Hollywood, Los Angeles. 1987 - 1994 Residency in Oral and Maxillofacial Surgery at the Dept. of Cranio,- Maxillofacial Surgery, Medical University Vienna (Head: Prof. Dr. S. Wunderer und Prof. DDr. R. Ewers). 1992 Graduation from Dental School, Medical University Vienna (Head: Prof. Dr. R. Slavicek). 1995 Visit of the Division of Plastic Surgery, (Prof. Ralph Millard), University of Miami, School of Medicine, Florida. 1995 Visit of the Plastic and Reconstructive Surgery Unit of the Hospital General "Manuel Gea Gonzales", (Prof. Fernando Ortiz - Monasterio), Mexico City. 2002 Thousand Smiles Mission San Jose*, Costa Rica, Hospital de los Ninos, Hospital Calderon la Guardia, Universidad Latina de Costa Rica. 2018 Visit at Chang Gung Hospital, Craniofacial Surgery, Prof. Yu-Ray Chen 2021 Honorary Fellowship of the AAOMS (American Association of Oral and Maxillofacial Surgeons) Since 1994 Senior Staff Member of the Dept. of Cranio- Maxillofacial and Oral Surgery, Medical University Vienna. Since 2004 Assistant Professor of the Dept. of Cranio- Maxillofacial and Oral Surgery, Medical University Vienna Main activity: Orthognathic Surgery, Preposthetic and Oral Surgery. Author and Co-author of multiple articles in national and international journals (www.millesi.at). President of the International Association of Oral and Maxillofacial Surgeons, IAOMS, 2020-2021. Immediate Past President of IAOMS, 2022-2023 International lecturer of the Curso de Experto en Cirurgía Ortognática y Ortodoncia Quirúrgia, of the UIC (International University of Catalyuna) Barcelona, Spain International lecturer of the Orthognathic Master Course "Experto en Ortognatica" of the University Alcala, Director: Prof. Julio Acero, Madrid, Spain International lecturer of the Course of Contemporary Studies in Maxillofacial Surgery, of the postgraduate program in Health Sciences of the Teaching and Research Institute (IEP) of the Sirio Libanes Hospital, Sao Paolo, Brazil Member of the Austrian Association of OMS and General Surgery. Member of the European Association of Cranio Maxillofacial Surgery. Member of AO CMF Honorary Member of the South African Association of Orel and Maxillofacial Surgery. Organizer of multiple international and national conferences of OMS including the ICOMS 2005 and 4 times an International AO CMF Symposium on Orthognathic Surgery in Vienna.