- Since 2008: Professor in Physics at KTH, Stockholm.
- 2000-2008: Associated professor (lektor) in Theoretical Physics at KTH.
- 1999-2000: Associated professor (lektor) in Mathematics at SLU, Uppsala.
- 1994-1998: Assistant professor (forskarassistent) in Theoretical Physics at KTH in the group of J. Mickelsson.
- 1991-1994: Postdoc at Department of Physics, University of British Columbia (UBC), Vancouver, Canada, in the group of G.W. Semenoff.
- 1989-1991: Research and teaching assistant in Theoretical Physics, TU Graz, Austria.
- 1990: Ph.D in Theoretical Physics at University of Vienna, Austria. Advisor: H. Grosse.
- 1986: M.Sc. in Technical Physics at Technical University (TU) Graz, Austria. Advisor: E. Schachinger.