| 1972 - 1985 | Assistant at the Department of Mathematics, Institute of Algebra (1972 - 1975) and Institute of Numerical Mathematics (1975 - 1985), Dresden University of Technology | ||
| 1986 - 1988 | Assistant professor (Oberassistent) at the Department of Mathematics, Institute of Analysis, Dresden University of Technology | ||
| 1983/84 and | Research stays at the Leningrad State University | ||
| 1988/89 | |||
| 1989 - 1998 | Associate professor (Dozent) of Mathematics at the Department of Mathematics, Institute of Analysis, Dresden University of Technology |
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| 1998 - 2000 | Researcher at the Department of Mathematics, Institute of
Analysis, Dresden University of Technology |
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| 2000 - 2001 | Researcher of the "Volkswagen-Stiftung" at the Max Planck Institute
for the Physics of Complex Systems, Dresden |
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| 2001 - 2002 | Visiting professor at the University of Magdeburg | ||
| 2002 - 2006 | Researcher of the German Research Foundation (DFG) at the Max Planck
Institute for the Physics of Complex Systems, Dresden |
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| Since 2007 | DAAD-long term lecturer (DAAD-Langzeitdozent) at the Department of Mathematics and Mechanics, St. Petersburg State University, Russia |