• Professor and Head, Institute of Applied Physics, Karslruhe Institute of Technology (KIT), Germany, 2009-;
  Professor, Institute of Nanotechnology, Karslruhe Institute of Technology (KIT), Germany, 2009-2020;
  Professor, Institue for Biological and Chemical Systems , Karslruhe Institute of Technology (KIT), Germany, 2009-2020;
  Adjunct Professor, Department of Physics, University of Illinois at Urbana-Champaign, USA, 1997-2020