- MD 1973 Uppsala University,
- PhD 1973 Uppsala University,
1973 – 1977: Physician, Akademiska sjukhuset, Uppsala
1977 – 1985: Senior lecturer in bacteriology, Uppsala University
1979 – 1980: Postdoctoral fellow/NIH Fogarty fellow; Cornell University, Ithaca, NY
1985 – 1989: Clinical senior lecturer/consultant, Karolinska institutet Stockholm
1989 – 1990: Visiting associate professor; The Rockefeller University, New York
1990 – present: Professor of Clinical Microbiology/consultant; Linköping University
2004 – 2005: Visiting Professor University of Wisconsin, Madison
- National Editor APMIS 1999 – 2010
- Chairman, Swedish Society of Medical Microbiology 1997 – 2000.
- 1998 Member, Commission on nomenclature, properties and units C-NPU, IFCC-IUPAC
- Chairman Commission on nomenclature, properties and units C-NPU, IFCC-IUPAC 2000 – 2005
- Titular member Division of Chemistry and Human Health, IUPAC, 2001 – 2005
- Member 2005 – present, Subcommittee on nomenclature, properties and units C-NPU, IUPAC