Wiss. Ass. (TU Braunschweig 1966-1973)
NAS-Research Associate NASA-Goddard Space Flight Center
Habilitation (TU Braunschweig 1973)
Oberass. (TU Braunschweig 1973-1977)
Dozent (TU Braunschweig 1973-1977)
apl. Professor für Geophysik (TU Braunschweig 1977-1982)
o. Professor für Geophysik (Köln 1982-2005)