We have an exciting opportunity for a Research Fellow to join the customary international humanitarian law (IHL) research team located at the Lauterpacht Centre for International Law at the University of Cambridge. The team is part of the British Red Cross International Law and Policy team which performs a wide range of operational and advisory functions which help the British Red Cross to carry out many of its special statutory roles as the recognised National Red Cross Society for the UK. The customary IHL project is jointly managed by the British Red Cross and the International Committee of the Red Cross (ICRC). In the first endeavour of its kind, in 2005 the ICRC published its Study on Customary International Humanitarian Law, which identified 161 key rules of customary IHL and presented the State practice on which they are based, as well as related international practice. In 2007, in cooperation with the British Red Cross, the ICRC started a project to update the collection of State and international practice underlying the Study.