1969-1974: Faculty of Mathematics and Mechanics, University of Bucharest, Romania
1974-1980: High-school Teacher of Mathematics
1980-1990: Assistant Professor
1990-1992: Lecturer
1992-1995: Associate Professor
1995- : Full Professor
At the Université Jean Monnet, Saint-Étienne, France (three months in 1992 and three months in 1996 with Tempus grants)
At the Université Claude Bernard, Lyon I, France (three months in 1993 with a COST research grant at the Laboratoire d'Algèbre, Institute de Mathématique et Informatique)
At the Universität Dortmund (two weeks with a Socrates mobility grant to Fachbereich Mathematik, Institut für Algebra und Geometrie)
Titles availables in here.
I am reviewer for Zentralblatt für Mathematik (since 1989), member of the Romanian Mathematical Society (since 1974) and Individual member of the European Mathematical Society (since 1997).