1992-2000 Member of editorial board, Journal of Low Temperature Physics
1992-2000 Elected Referee, Deutsche Forschungsgemeinschaft (DFG)
1992-2004 Founding member, Priority Research Program SFB 195 of theDFG
1994-1996 Chairman of Physics Department, University of Karlsruhe
1994-presentEditor for Solid State Sciences, Springer Tracts in Modern Physics
1997-2010 Group leader at Institute for Nanotechnology, ForschungszentrumKarlsruhe (now Karlsruhe Institute of Technology)
1997-2004 Member of the University of Karlsruhe Senate
1997-2002 Member of Editorial board, Journal of Physics
1998-2004 Chairman of Advisory Council, Albert-Einstein Minerva Centerfor Theoretical Physics, Weizmann Institute of Science, Rehovot,Israel
2000-2005 Divisional Associate Editor, Physical Review Letters
2001-present Scientific Member at Forschungszentrum Karlsruhe
2001-presentFounding member, DFG Research Center for Functional Nanostructures(CFN)
2001-2003 Member of the Selection Committee for the Max-Planck-Research Prize of the Max-Planck-Society and the Alexander-von-Humboldt- Foundation
2002-2008 Member and (since 2005) chairman of the Selection Committee for the Max-Born-Prize, the Gentner-Kastler-Prize and the Smoluchowski-Warburg-Prize of the German Physical Society