Simon Cleobury is Head of Arms Control and Disarmament at the Geneva Centre for Security Policy. He is a former British Deputy Disarmament Ambassador (2017–2023), where he represented the United Kingdom at the Conference on Disarmament and other disarmament fora in Geneva. From 2012 to 2016, he was Senior Policy Adviser at the UK Mission to the UN in New York. Previously, he was a corporate lawyer at Baker McKenzie. Simon obtained his Bachelor’s degree in Modern History at University College London and his Master’s degree in Historical Research from Oxford University. He studied law at BPP Law School, London.