National
Member of Subcommittee 3 of the Physics Committee of the Swedish Natural Science Research Council (NFR) that annually evaluates the NFR astronomy grant applications, 1988, 1992- date
Deputy Member of Swedish Natural Science Research Council (NFR), 1992-1995
NFR representative in Sweden-EURATOM Steering Committee for Fusion Research in Sweden, 1992-1995
Member of NFRs Program committee for Physics (PuF), 1992-date
Representative for the Swedish Royal Academy of Sciences on the Swedish National Committee of Astronomy, 1992-date
Member of NFR's ESO-NOT committee, 1992-date
International
Member of the Scientific Organizing Committee for the Conference "Variability of Blazars", Turku, Finland, 1991
Member of Council of Nordic Optical Telescope, 1993-1995
Member of Board of NORDITA (Nordic Institute of Theoretical Physics), Copenhagen, 1993-1996