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, USA
2000-present: Head, Interface Engineering Group, Hahn-Meitner Institute (HMI)
1996-1998: Visiting Professor, North Carolina State University, Department of Materials Science and Engineering, Raleigh, USA
1994-2000: Guest Professor, Brandenburg-Technical University Cottbus, Germany
1982-1994: Head, Department of Interfaces, HMI
1994-2000 Professor of Physics at Technical University Berlin