Birthe holds a PhD in War Studies from the Department of War Studies, King’s College London, and a Diplom in Political Science and Law from Philipps Universität Marburg, Germany. Her research focusses on Private Military and Security Companies (PMSCs), NGO security and civil-military relations. In addition she has also conducted research on IHL, particularly the regulation of PMSCs and on German and European Defense and Security Policy, including on maritime security. From 2015/16 she was Fritz Thyssen Fellow at the Weatherhead Center for International Affairs, Harvard University. Before coming to Harvard she taught in the Department of War Studies, King’s College London, where she co-founded the Private Military and Security Research Group. She has published in Parameters, Small Wars & Insurgencies, International Peacekeeping, with Routledge and Oxford University Press (forthcoming).