• 2017 – 2019 Head of the Mathematics and Computer Science Department, The Open University of Israel
• 2011 - Full Professor, The Open University of Israel
• 2011 - 2013 Head of the Graduate M.Sc. Program of the Computer Science Division, The Open University of Israel
• 2004 - 2006 Head of the Computer Science Division, The Open University of Israel
• 2006 Associate Professor, The Open University of Israel
• 2004 Senior Lecturer, The Open University of Israel
• 2000 Lecturer, The Open University of Israel
• 1998 - 2000 Post-doctoral Fellow, Max-Planck-Institute fur Informatik, Saarbrucken, Germany
• 1997 - 1998 Post-doctoral Fellow, Dept. of Combinatorics and Optimization, University of Waterloo, Canada.