since April 2014 Full Professor for Communication via Social Media at Eberhard Karls University / Knowledge Media Research Center, Tübingen
since April 2013 Leader research group ERC / Social Media at Knowledge Media Research Center, Tübingen
August 2012 - March 2013 Associate Professor at the Department of Communication Science, VU University Amsterdam (3 days a week)
November 2011 - March 2013 Associate Professor for Social Media and Reputation Management at the NHL Leeuwarden (2 days a week)
April 2004 - July 2012 Assistant Professor for New Media at the Department of Communication Science, VU University Amsterdam (since November 2011 for 3 days a week)
October 2001 - March 2004 Assistant Professor at the Department of Organizational and Social Psychology, Chemnitz University of Technology, Germany
April 2000 - September 2001 Postdoc at the Department of Social Psychology, VU University Amsterdam
October 1999 - March 2000 Research assistant at the Department of Organizational and Social Psychology, Chemnitz University of Technology, Germany
November 1996 - September 1999 Research assistant at the Department of Economic and Social Psychology, Catholic University of Eichstätt, Germany

• social media use
• social capital
• emotional support
• ambient awareness
• (enterprise) social media and professional knowledge sharing