| 2015 – |
Director, Educational Initiatives College of Science, George Mason University http://cos.gmu.edu |
| 2014 – 2015 |
Director, Educational Technology College of Science, George Mason University http://cos.gmu.edu |
| 2013 – |
Adjunct Faculty and Distance Education Program Coordinator College of Science, George Mason University http://cos.gmu.edu |
| 2004 – 2012 |
Lecturer Hellenic Open University, Greece http://www.eap.gr |
| 2005 – 2008 |
R&D Engineer and Project Manager TALENT S.A, Athens, Greece. http://www.talent.gr |
| 2002 – 2005 |
Researcher Data and Knowledge Engineering Group (DKE) Computer Technology Institute (CTI), Athens, Greece. http://www.cti.gr |
| 2000 – 2002 |
Associate Professor (tenured) Department of Computer Science, Aalborg University (AAU), Denmark http://www.cs.aau.dk |
| 1997 – 2000 |
Assistant Professor (tenure-track) Department of Computer Science, Aalborg University (AAU), Denmark http://www.cs.aau.dk |
| 1995 – 1997 |
Post-doctoral Researcher National Center for Geographic Information and Analysis (NCGIA) Department of Spatial Information Science and Engineering (SIE) University of Maine, Orono, ME, USA http://www.spatial.maine.edu |
| 1992 – 1995 |
Research Assistant Computer Technology Institute (CTI), Patras, Greece. http://www.cti.gr |
