2009 – 2010 Fritz Thyssen Fellow, Weatherhead Center for International Affairs, Harvard University
2001 – 2002 research fellow at the Copenhagen Peace Research Institute (COPRI) and the Institut des Relations Internationales et Stratégiques (IRIS) in Paris
1999 – 2000 research fellow at the German Bundestag and the party executive of the Social Democratic Party (SPD), International Affairs, Berlin