 | INRETS, Arcueil, France (1998, 1999, 2002, 2005, 2009, 2010) |
| University of Minnesota, Minneapolis (1994, 2005, 2014) |
| Université d’Evry - Val d’Essonne, France (1996) |
| Universität-Gesamthochschule Siegen, Germany (1996) |
| University of Massachusetts, Lowell (1997,1998) |
| Massachusetts Institute of Technology, Cambridge, U.S.A. (1998, 2001, 2005, 2013,
2019, 2021) |
| Delft University of Technology, The Netherlands (1998, 2004, 2006, 2020) |
| Purdue University, West Lafayette, Indiana (1999, 2010) |
| University of California, Berkeley (2002, 2010, 2014, 2016) |
| University of Toronto, Canada (2003) |
| Columbia University, New York (2004, 2012) |
| Technion – Israel Institute of Technology (2004, 2005, 2006, 2010, 2020) |
| Alpen-Adria Universität Klagenfurt, Austria (2004) |
| Canada Research Chairs (2004) |
| University of Durham (2005) |
| Cyprus University of Technology (2006, 2009) |
| Monash University, Melbourne, Australia (2007, 2010, 2013) |
| Trinity College, Dublin, Ireland (2007) |
| Northwestern University, Illinois (2008) |
| University of Pisa, Italy (2009) |
| University of Leeds, U.K. (2009) |
| Cornell University, U.S.A. (2010) |
| INRIA, Center of Grenoble, France (2010) |
| The University of Texas at Austin, U.S.A. (2010) |
| University of Washington, Seattle, U.S.A. (2010) |
| University of Southampton, U.K. (2011, 2013, 2014, 2016) |
| University of Southern California (USC), Los Angeles, U.S.A. (2011) |
| Technical University of Catalonia (BarcelonaTech), Barcelona, Spain (2012) |
| The University of Sheffield, U.K. (2012) |
| University of Connecticut, U.S.A. (2012) |
| Michigan Technological University, U.S.A. (2012) |
| Princeton University, U.S.A. (2012) |
| University of Bristol, U.K. (2013) |
| University of Glasgow, U.K. (2013, 2015) |
| Imperial College London, U.K. (2013) |
| Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland (2014, 2016) |
| Technical University of Munich, Germany (2014) |
| University of Malta (2015, 2017, 2019) |
| University of Manchester, U.K. (2015) |
| Loughborough University, U.K. (2015) |
| "Dunărea de Jos" University of Galaţi, Romania (2015) |
| University of Sydney, Australia (2016) |
| University of Arizona, U.S.A. (2016) |
| Hasselt University, Belgium (2017) |
| University of California at Los Angeles (UCLA), U.S.A. (2017) |
| New York University Abu Dhabi, United Arab Emirates (2018) |
| Indian Institute of Technology Madras, India (2018) |
| University of Delaware, U.S.A (2019) |
| University of Luxembourg (2019) |
| University of Oxford, U.K. (2020) |
| McGill University, Canada (2020) |
| Korea Advanced Institute of Science and Technology (KAIST), South Korea (2020). |
| Stanford University, U.S.A. (2021) |
| Business University of Athens, Greece (2000, 2015, 2016,2017) |
| University of the Aegean, Greece (2001, 2002) |
| University of Thessaly, Greece (2001, 2008, 2013, 2016, 2018, 2019, 2020) |
| University of Peraeus, Greece (2001) |
| Hellenic Institute of Transport, Greece (2006, 2009, 2020) |
| National Technical University of Athens, Greece (2008, 2009, 2013, 2016, 2020) |
| University of Macedonia, Greece (2010, 2015) |
| University of Patras (2012, 2013, 2014) |
| School of Pedagogical and Technological Education (ASPETE) (2013) |
| Technological Educational Institution (T.E.I.) of Athens (2013) |
| University of Western Macedonia (2018, 2021a, 2021b) |
