- Security studies, including critical approaches and 'human security';
- Intrastate armed conflict, civil war, intervention and political violence;
- International organizations and multilateralism; and
- Peacebuilding and reconstruction in conflict-prone and post-conflict societies.
Between 2007 and 2013 I was at the Department of Political Science and International Studies at the University of Birmingham, UK. Before joining Birmingham I was Director of Studies on Conflict and Security in the Peace and Governance Programme of the United Nations University, based in Tokyo. At UNU I was responsible for policy-relevant research projects on refugees and human displacement, non-traditional security including human security, challenges to multilateralism, democracy and democratization in post-conflict societies, human trafficking, peacebuilding, and political violence. My UN work involved visits to a number of countries including Bosnia, Cambodia, Liberia, Ghana, Philippines, and Sri Lanka and I have conducted independent research in Kosovo, Rwanda and Cyprus. In addition to my work for UNU I also periodically supported other UN agencies including UNDP and UNESCO. I continue to be involved in a UNU research project (on peacebuilding in conflict-prone societies), and to conduct fieldwork in conflict-affected countries. I'm also the Editor-in-Chief of the journal Civil Wars.