1977
| Doctoral thesis on "Geophysical interpretations of geographic latitude variations"
|
1981 - 1985
| Research scientist and lecturer at Institute for Geodesy and Photogrametry, Division for Astronomical and Physical Geodesy, in Breslau
|
1985 - 1987
| Alexander-von-Humboldt Fellowship at the Institute for Astronomical and Physical Geodesy, Technical University Munich
|
1988
| Research scientist at Institute for Astronomical and Physical Geodesy, Technical University Munich
|
1988
| Research scientist at Deutsches Geodätisches Forschungsinstitut, Division 1 Theoretical Geodesy, Munich
|
1989 - 1990
| Research scientist at Astronomical Observatory of Bonn University
|
1991 - 1992
| Senior scientist at Deutsches Geodätisches Forschungsinstitut, Division 1 theoretical Geodesy, Munich
|
1993 - 2007
| Senior scientist at GeoForschungsZentrum Potsdam
|
2008
| Professor for precise navigation and -positioning at Technische Universität Berlin
|
