Public international law, human rights law and peacekeeping/peacebuilding. I study the law, policy and practice of civilian protection by UN peacekeepers. Building on doctrinal research on peacekeepers' authority to use force under Security Council resolutions and international human rights law, I draw on interviews in New York, South Sudan, Central African Republic and the DR Congo to understand how UN officials and state actors interpret their protection obligations towards civilians. In addition to published material, I have articles forthcoming on how UN peacekeepers understand their authority to use force to protect civilians and the challenges of applying the UN's human rights due diligence policy when working with host state security forces.