| 2005-2006 | Fellow, "European Foreign and Security Policy Studies Programme", founded jointly by Compagnia di San Paolo, Volkswagen Stiftung and Riksbankens Jubileumsfond
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| 2005 | Visiting Position, CERI-Sciences Po, Paris
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| 2006 | Visiting Position, Center for European Policy Studies, Brussels
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| 2008 | Visiting Fellow, European Union Institute for Security Studies
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| 2010 | Visiting Position, Center for Transatlantic Relations, SAIS-Johns Hopkins University, Washington, D.C.
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| 2007-2012 | Senior Research Fellow and Head, Research Cluster "European Foreign and Security Policy", Institute for European Studies, Vrije Universiteit Brussels
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| 2012-2013 | Fellow, Stiftung Neue Verantwortung, Berlin
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| since 2013 | Senior Analyst, EUISS - EU Institute for Security Studies, Paris |
