-1968-69 Research assistant at the University Leipzig
-1970-89 Researcher in the fields of Artificial Intelligence (AI) and Computational Linguistics (CL)
with Robotron, Head of the AI Laboratory
-1976 Ph.D. in Computer Science (Promotion, Dr.rer.nat., in the field of AI)
-1986 Habilitation (Dr.rer.nat.habil.) in the field of Knowledge Representation
-1988-92 Lecturer for Artificial Intelligence at the TU Dresden
-1989-92 Researcher at SRS Dresden and Siemens-Nixdorf (Development of Geographic...