Doctor of Medicine, University Freiburg, Germany, 1978. Doctor of Philosophy, University Münster, Germany, 1988.
Resident University Erlangen, Germany, 1978-1980, University Basel, Switzerland, 1981, Harvard University School Medicine, Boston, 1982-1984. Senior physician University Münster, Germany, 1984-1987. Associate professor University Berlin, 1987-1995.
Professor, head department University Jena, Germany, since 1995.
Member German Academy Pediatric Surgery (president 1993), German Association Pediatric Surgeons (member presidential board since 1993), British Association Pediatric Surgery, Swiss Association Pediatric Surgery, Austrian Association Pediatric Surgery.