Lord Darroch is a retired UK civil servant and life peer in the House of Lords. His diplomatic career spanned over 40 years, primarily focusing on national security issues and European policy. Most recently, Lord Darroch served as the British Ambassador to the United States (2016-2019). Prior to Washington, he was National Security Adviser to Prime Minister David Cameron (2012-2015), and in that role, oversaw issues such as the rise of Daesh in Iraq and Syria, Russian aggression in Ukraine, and the collapse of government authority in Libya. In addition, he worked in senior roles on UK-EU policy and multilateral negotiations, including spells as Permanent Representative to the European Union (2007-2011) and as EU Adviser to Prime Minister Tony Blair (2004-2007).