Research and training assistant Institute Informatics, Warsaw University, 1978-1983, senior software engineer, 1983-1993. System designer Carlstedt Elektronik, Partille, Sweden, 1993-1994. Co-founder, system designer Czech Republic&T, Geteborg, Sweden, since 1994.
Visiting researcher Catholic University Leuven, Belgium, 1985. Visiting research fellow University Bristol, England, 1989-1990. Guest researcher University Linköping, Sweden, 1990-1991.
Mem program committee 6th and 7th International Conference on Logic Programming, Lisbon, 1989, Jerusalem, 1990, Joint International Conference and Symposium on Logic Programming, Washington, 1992, 2nd, 4th, 5th International Symposium on Programming Language Implementation and Logic Programming, Linköping, 1990, Leuven, 1992, Tallinn, 1993. Visiting assistant professor University California, Riverside, 1992.
1978 - 1983
1993 - 1994