Chief, Informatics Unit, Industrial Technology Development Division, Department for Industrial Promotion, Consultations & Technology, United Nations Industrial Development Organization. Chief, Advanced Technology Unit, Technology Programme, United Nations Industrial Development Organization, Vienna, 1983-1988. Director, Institute of Science(s), Technical and Economic Information, Poland, 1975-1982.
Director, Centre for Informatics, Tech University of Warsaw, Poland, 1972-1975. Professor, 1966-1971, Staff Member, 1962-1966, Electronics Department, Tech University of Warsaw. Programmer, Institute of Computer Construction, Polish Academy of Science, 1959-1962.