| Chair of Department of Algebra | Institute of Mathematics, National Academy of Sciences | 2006-now |
| Professor | Kiev Taras Shevchenko University, Department of Mathematics | 1980-2006 |
| Docent (Lecturer) | Kiev Taras Shevchenko University, Department of Mathematics | 1973-1980 |
| Senior Instructor | Kiev Taras Shevchenko University, Department of Mathematics | 1971-1973 |
| Instructor | Kiev Taras Shevchenko University, Department of Mathematics | 1969-1971 |
| Research Candidate | Ukrainian Academy of Science, Institute of Mathematics | 1966-1969 |
| Research Fellow | Max-Plank-Institut für Mathematik | January - December 2005 |
| Visiting Professor | Uppsala Universitet | September - December 2004 |
| Visiting Professor | Universität Kaiserslautern | October 2001 - September 2002 |
| Research Fellow | Max-Plank-Institut für Mathematik | September 1999 - August 2000 |
| Visiting Professor | Université Louis Pasteur, Strasbourg | February - June 1999 |
| Visiting Professor | Universität Kaiserslautern | October 1998 - February 1999 |
| Visiting Professor | Université Louis Pasteur, Strasbourg | February -June 1998 |
| Visiting Professor | University of California at Santa Barbara | April - June 1997 |