Robert Peter Hannigan CMG (born 1965) is a cybersecurity specialist who has been Warden of Wadham College, Oxford, since 2021. He was a senior British civil servant who previously served as the director of the signals intelligence and cryptography agency the Government Communications Headquarters (GCHQ) and established the UK's National Cyber Security Centre. His sudden resignation as director was announced on 23 January 2017, and he stepped down at the end of April 2017 to pursue a career in private sector cyber security, academia and as a security commentator. In 2021 he became Warden of Wadham College, Oxford.