-  1978-...., Associate Professor, 
 Institute of Mathematics
 since 1977, head of Subdivision of Computer Science
 
-  1984-1985 Visiting Associate Professor, 
 Computer Science & Engineering Dept.
 University of Connecticut, Storrs
 
- 
 1971-1976 Research Assistant Professor 
 Institute of Library and Information Science
 Warsaw University
 
- 
1967-1971 Assistant Professor 
 Warsaw Technical University, Plock Campus
 
-  1966-1967 Assistant Professor, 
 Institute of Mathematics
 Warsaw University
 
-  1964-1966 Teaching Assistant in Chair of Geometry 
 Warsaw University
 
 
 March 11, 1996 -- 
trybulec@math.uwb.edu.pl