Northeastern University, USA, Research/Teaching Assistant, 01/09/1989-01/09/1994.  Mandatory military service Greece, G.S.A-Research and Development Centre, 22/11/94– 22/06/96.  Delft University of Technology-DIMES, NL, PostDoc Fellow, 01/08/1996–01/09/1998.  Netherlands Institute for Metals Research, NL, Metals Fellow, 01/09/1998 – 01/10/2000.  University of Groningen, NL, University lecturer 01/10/2000–15 /07/2014.  University of Groningen, NL, Professor in Physics 15/07/2014 – present.

Ranoscale surface roughness, Casimir effect, Micro/Nanoelectromechanical systems, Nanoparticles, Kinetic roughening, Scanning probe microscopy, Adhesion, Friction