10/2008-present: Associate Director, Institute Solar Fuels and Energy Storage, Helmholtz Zentrum Berlin (HZB)2007: Adjunct Professor, Department of Materials Science and Engineering, North Carolina State University, Raleigh, USA2000-present: Head, Interface Engineering Group, Hahn-Meitner Institute (HMI) 1996-1998: Visiting Professor, North Carolina State University, Department of Materials Science and Engineering, Raleigh, USA1994-2000: Guest Professor, Brandenburg-Technical University Cottbus, Germany1982-1994: Head, Department of Interfaces, HMI1994-2000 Professor of Physics at Technical University Berlin