Doctor of Medicine, University Ljubljana, Slovenia, 1954.
Intern General Hospital, Koper, 1955-1957. Resident The Institute Oncology, Ljubljana, 1958-1963. Assistant professor The Faculty of Medicine, 1964-1972.
Research fellow Karolinska Sjukhuset, Stockholm, 1973—1996. Professor oncology University Ljubljana, since 1976, chairman, chair oncology, 1982—1996, head department tumor biology, 1986-1995. Lecturer European School Oncology, Milan, 1985—1993.
Professor emeritus Polytechnic, Nova Gorica, Slovenia, since 2005. Visiting professor University Nebraska Medical School, Omaha, 1981, 82. Director The Institute of Oncology, Ljubljana, 1982-1986.
Lecturer School Environmental Sciences, Nova Gorica, Slovenia, since 1997, member Senate, University Politecnic, Nova Gorica, Slovenia. Member Academy Council, chair oncology and radiotherapy Faculty of Medicine, University Maribor, Slovenia.
Member The Djerba Group, 1995. Member American Association for Cancer Research, New York Academy of Sciences, Cancer Research Foundation (co-founder 1993), Academy Association for Third University in Slovenia (president), Lion's Club Ljubljana (governor 1998-1999).
Married Ljudmila Mila Gec, July 15, 1956 (divorced 1988). Children: Andrew, Tadeusz.