| 2001 -2001 | Visiting Surgeon, at the Toronto General Hospital, Toronto, Canada |
| 1996 -1997 | Research Fellow at Baylor College, Houston, USA |
| 1995 | Visiting Surgeon at The Methodist Hospital, Baylor College, Houston, USA |
| 1994 | Visiting Surgeon at Texas Heart Institut, Houston, USA |
| 1982 -1982 | Fellowship at the Dept. of Medicine, Cardiovascular Division, Brigham & Womens Hospital, Boston, USA |
| 1981 -1981 | Fellowship German Heart Center in Munich Fellowship Univeristy Hospital Zürich |
| 1977 -1984 | Medical School University of Innsbruck |
| 1997 -2005 | INTERNET JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY: |
| 2000 -2011 | THE ANNALS OF THORACIC SURGERY |
| 2008 -2008 | JOURNAL OF CLINICAL ANESTHESIA |
| 2007 -2007 | JOURNAL OF RHEUMATOLOGY |
| 2003 -2003 | WIENER KLINISCHE WOCHENSCHRIFT |
| 2011 | The Houston Aortic Symposium - Frontiers in Cardiovascular Diseases Chair |
| 2009 | "Bail Outs" Aortic Challenges Organisator |
| 2009 | "Bail Outs" Aortic Challenges Wissenschaftlicher Beirat/Beirätin |
| 2009 | "Bail Outs" Aortic Challenges Chair |
| 2009 | The Houston Aortic Symposium - Frontiers in Cardiovascular Disease Chair |