Full Professor, Chair in Social Interaction and Interdependence, VU University, Amsterdam (2000+)      here

Honorary Full Professor, Societal Conflicts, University of Leiden (1999-2009)   here

Scientific Director of Kurt Lewin Institute, an interuniversity graduate school of social psychology and its applications (2001-2004)   here
Associate Editor of European Journal of Social Psychology (1998-2001)     here

Associate Editor of Journal of Personality and Social Psychology (2001-2002; 2007-2008)   here

Associate Editor of Psychological Science (2008, 2012 - now)  here

Member, vice-president, president Society of Experimental Social Psychology   here

Member of Policy Advice Committee at Netherlands Organizations of Scientific Research (1999-2003).   here