Professional background (excerpt):

• Studies in law in Regensburg, Paris X and at the Humboldt-Universität zu Berlin, 1994–1999
• Master of Laws at King’s College in London, 2000–2001
• PhD in "Ungleichzeitigkeit und Europäisches Verfassungsrecht" (Supranational Differentiation and European Constitutional Law) at the Humboldt-Universität zu Berlin (awarded the 'Humboldt-Prize'), 2003
• Postgraduate judicial service traineeship (Referendariat) at the High Court of Berlin, the Federal Ministry of Justice (European Law Department) and at the Federal Foreign Office (German Permanent Representation to the EU), 2002–2004
• Research assistant at the Walter-Hallstein-Institute for European Constitutional Law at the Humboldt-Universität zu Berlin, 2000 and 2001–2005
• Visiting fellow at the British Institute of International and Comparative Law, 2005–2006
• Academic co-ordinator of the graduate programme "Constitutionalism Beyond the State: European Experiences and Global Perspectives" and research assistant at the Humboldt-Universität zu Berlin, 2005–2009
• Postdoctoral qualification for teaching at university level (Habilitation) at the Humboldt-Universität zu Berlin with a thesis on Migration Governance through Administrative Law, 2009
• Professor of public, European and international law at the University of Konstanz, since 2010
• Director of the Research Centre for Immigration & Asylum Law (FZAA) at the University of Konstanz, since 2010
• Key researcher in the Excellence Cluster "Cultural Principles of Integration" at the University of Konstanz, since 2012