- 2006-Present - Lecturer, Department of Mathematical Sciences, The University of Texas at El Paso, USA.
- 2001-2010 - Assistant Professor, Institute of Theoretical Mechanics, Department of Civil Engineering, Silesian University of Technology in Gliwice, Poland.
Between 2006-2010 - unpaid sabbatical leave.
- 2006 - Postdoctoral Position (Researcher), Bergen Language Design Laboratory (BLDL), Department of Computer Science, The University of Bergen, Bergen, Norway. Project: SAGA - Scientific Computing with Algebraic and Generative
Supervisor: Prof. Magne Haveraaen.
- 2003 - Postdoctoral Position (Researcher), Department of Mathematics, Faculty of Natural Sciences and Mathematics, University of Vienna, Vienna, Austria. COCONUT Project - COntinuous CONstraints - Updating the Technology.
Supervisor: Prof. Arnold Neumaier.
- 2002 - Research Engineer, Chevron Corporation, San Ramon, California, USA.
- 1995-2001 - Lecturer and Ph.D. Student, Institute of Theoretical Mechanics, Department of Civil Engineering, Silesian University of Technology in Gliwice, Poland.