1. Instructor (Asystent)  at the Mathematical Institute, 
                   University of Wroclaw , Poland, 1993-1999

2. Assistant Professor (Adiunkt)  at the Mathematical Institute, 
                   University of Wroclaw , Poland, 1999-2009

3. Postdoctoral research position  EURANDOM , The Netherlands, 2000-2003

4. Postdoctoral research position  Utrecht University,
                   The Netherlands, 2004-2005, 2006-2007

5. Associate Professor (position, profesor nadzwyczajny UWr)  at the Mathematical Institute, 
                   University of Wroclaw , Poland, since 2009