Elizabeth “Beth” Sizeland is a nonresident senior fellow at the Scowcroft Strategy Initiative of the Atlantic Council’s Scowcroft Center for Strategy and Security. She has accrued over twenty years of national-security experience in the UK government, and her areas of expertise include security strategy and policy, countering state threats, investment security, cybersecurity, national resilience, serious and organized crime, counterterrorism, and crisis response.

Prior to working as the United Kingdom’s Joint Intelligence Organisation attaché in Washington, DC, Sizeland held the position of deputy national security adviser and as adviser to the UK prime minister on intelligence, security and resilience issues, working closely with her counterparts in the United States. Sizeland has also held roles as a director general at the UK Government Communications Headquarters, a director in the UK Home Office tackling modern slavery and exploitation, and a director for transport security for the UK Department for Transport. Prior to that, Sizeland worked in the Cabinet Office Briefing Room, the United Kingdom’s national emergency response committee, and has held operational and analytical posts focused on a wide range of international issues.