| 1974–1975: |
Technical engineer at an industrial laundry and dry cleaning company in Dresden/Germany |
| 1976: |
Technical engineer for research and development at Siemens AG/Austria |
| 1976–1984: |
Systems analyst at the Computer Center of the University of Vienna Medical School at the Department of Medical Computer Sciences/Austria |
| 1986–1992: |
Senior Research Associate at the Department of Medical Computer Sciences, University of Vienna/Austria |
| 1987: |
Foundation and project leader of the "Medical Expert Systems Laboratory" at the Department of Medical Computer Sciences, University of Vienna/Austria |
| 1988: |
"Habilitation zum Universitätsdozent" (university lectureship) in Medical Informatics at the University of Vienna Medical School/Austria |
| January 1990: |
GDMS/GI certificate "Medical Computer Scientist" according to the guidelines of the German Society for Medical Documentation, Informatics, and Statistics (GDMS) and the Society for Informatics (GI) |
| 1992: |
"Außerordentlicher Titular Universitätsprofessor" (Berufstitel) (Associate Professor) at the Department of Medical Computer Sciences, University of Vienna/Austria |
| 1992: |
Extension of the "Medical Expert Systems Laboratory" to "Section on Medical Expert and Knowledge-Based Systems" at the Department of Medical Computer Sciences, University of Vienna/Austria |
| 1997: |
"Außerordentlicher Universitätsprofessor" (Amtstitel) (Associate Professor) at the Department of Medical Computer Sciences, University of Vienna/Austria |
| since 10/3/2001: |
Head of the Section on Medical Expert and Knowledge-Based Systems of the Department of Medical Computer Sciences at the University of Vienna, now: Section for Medical Expert and Knowledge-Based Systems of the Center for Medical Statistics, Informatics, and Intelligent Systems at the Medical University of Vienna/Austria |
| 2/4/2002-12/31/2005: |
Foundation and Director of the Ludwig Boltzmann Institute for Expert Systems and Quality Management in Medicine, Vienna/Austria |
| since 8/27/2002: |
Foundation, CEO, and Scientific Head of Medexter Healthcare GmbH (university spin-off) |
| 1973: |
Medical image processing project during a three-months practical training at the Department of Pathology, Medical Academy of Dresden (now: Medical School of the Technical University of Dresden/Germany) |
| 1975–1976: |
Research associate at the Austrian Academy of Science "Man and Biosphere High Mountain Program" |
| 1983: |
Participation in a three-months "Young Scientists' Summer Program" at the International Institute for Applied Systems Analysis, Laxenburg/Austria |
| 1984–1986: |
Visiting Research Fellow at the Computer Science Division, Department of Electrical Engineering and Computer Science, University of California, Berkeley/U.S.A.; Fellowship of the Max-Kade-Foundation/New York |
| 6/1–8/31/1993: |
Visiting Associate Professor at the Department of Medicine, Section on Medical Informatics, Stanford University School of Medicine, Stanford/U.S.A.; Fulbright-Fellowship |
| 7/1–8/5/2000: |
Visiting Scholar at the Department of Electrical Engineering and Computer Sciences, Computer Science Division, Berkeley Initiative in Soft Computing (BISC), University of California, Berkeley/U.S.A. |
| since 11/1/2002: |
Head of MES Program of the Memorandum of Understanding for the Establishment of a Research Link between Berkeley Initiative in Soft Computing (BISC) Program, Electrical Engineering and Computer Sciences Department at the University of California, Berkeley, U.S.A. and Section of Medical Expert and Knowledge-Based Systems (MES), Department of Medical Computer Sciences at the University of Vienna Medical School, Vienna/Austria |
| 5/1–5/31/2005: |
Visiting Research Fellow at the Department of Computer Science, Meiji University, Kawasaki/Japan |
| 9/1–9/30/2008: |
Visiting Scientist at the Clinical Decision Making Group, Computer Science and Artificial Intelligence Laboratory (CSAIL), Massachusetts Institute of Technology (MIT), Cambridge, U.S.A. |