Marcus Willett

In a 33-year career at the UK's Government Communications Headquarters (GCHQ) Marcus Willett CB OBE rose to become its deputy head, with personal responsibility for, amongst other things, all GCHQ cyber operations. Previously, he was GCHQ's first Director Cyber and led the UK national offensive cyber programme. He also held senior posts across the wider UK intelligence and security community. Since 2018, Marcus has been Senior Adviser for Cyber at the International Institute for Strategic...See more

In a 33-year career at the UK's Government Communications Headquarters (GCHQ) Marcus Willett CB OBE rose to become its deputy head, with personal responsibility for, amongst other things, all GCHQ cyber operations. Previously, he was GCHQ's first Director Cyber and led the UK national offensive cyber programme. He also held senior posts across the wider UK intelligence and security community. Since 2018, Marcus has been Senior Adviser for Cyber at the International Institute for Strategic Studies (IISS) and has advised government policymakers as well as private companies in the UK, US and elsewhere. His previous publications include articles on the SolarWinds hack, the Ukraine war, and a methodology for measuring the cyber power of states. See less