| 2006– |
|
Faculty member, International Max Planck Research School of the Life Course (LIFE) |
| 2006–2008 |
|
Vice-President, Max Planck Society, Munich |
| 2005 |
|
Visiting Professor, Stanford University, California, USA |
| 2003–2005 / 1998–1998 |
|
Managing Director, Max Planck Institute for Human Development, Berlin |
| 2002 |
|
Visiting Professor, University of Zurich, Switzerland |
| 2000 / 1997 |
|
Visiting Professor, University of Fribourg, Switzerland |
| 1996– |
|
Senior Fellow (Wissenschaftliches Mitglied) of the Max Planck Society and Institute Co-Director, Max Planck Institute for Human Development, Berlin |
| 1996– |
|
Professor of Education (Honorary Professor), Humboldt-Universität zu Berlin |
| 1995 |
|
Visiting Professor, University of Winston Salem, North Carolina, USA |
| 1992–1996 |
|
Managing Director, Leibniz Institute for Science Education (IPN), Christian Albrecht University of Kiel |
| 1991–1992 |
|
Director, Department of Education, Leibniz Institute for Science Education (IPN), Christian Albrecht University of Kiel |
| 1991–1996 |
|
Full Professor of Education, Christian Albrecht University of Kiel |
| 1989– |
|
Professor of Education, Freie Universität Berlin |
| 1989 |
|
Visiting Professor, University of Salzburg, Austria |
| 1983–1989 |
|
Privatdozent in Education, Freie Universität Berlin |
| 1982–1991 |
|
Senior Research Scientist, Max Planck Institute for Human Development, Berlin |
| 1975–1982 |
|
Research Scientist, Max Planck Institute for Human Development, Berlin |
| 1972–1974 |
|
Visiting Scholar, Max Planck Institute for Human Development, Berlin |
| 1969–1972 |
|
Assistant Professor of Classics, University of Würzburg |
| 1968–1969 |
|
Assistant Professor of Classics, Technische Universität Berlin |
| 1967–1968 |
|
Research Assistant in Classics, Technische Universität Berlin |