I am a Professor of Public International Law at the University of Exeter. My work focuses mainly on international conflict and security law and questions of operational law, including the law of armed conflict, the legal status of foreign armed forces and the changing character of warfare. I have published widely in leading academic journals on status of forces agreements, peace support operations, European security and defence policy and the legal aspects of grey zone conflict and hybrid threats.

I maintain close working relationships with legal practitioners in the armed forces and lecture regularly on the subject of international law and military operations in the UK and abroad. I am a Senior Fellow at the Lieber Institute of the United States Military Academy, a Fellow of Supreme Headquarters Allied Powers Europe and a former Fellow of the Allied Rapid Reaction Corps.