Sir Jeremy Greenstock is chairman of the UN Association in the UK and chairman of the strategic advisory company Gatehouse Advisory Partners Ltd.

He was a career diplomat from 1969 to 2004, developing specialisations in the Middle East, Transatlantic Relations and the United Nations. He served as political director in London from 1996 to 1998. He was UK Ambassador to the UN in New York from 1998 to 2003 the period which covered 9/11 and the allied invasions of Afghanistan and Iraq. From 2001 to 2003, he was chairman of the Security Council's Counter-Terrorism Committee. He was UK special envoy for Iraq from 2003 to 2004.

He directed the Ditchley Foundation from 2004 to 2010 and was a special adviser to BP during the same period. Currently he is also a non-executive Director of De La Rue plc and of Lambert Energy Advisory Ltd, a Trustee of the International Rescue Committee (UK) and Special Adviser to MTM Capital Partners and to the NGO Forward Thinking.

Sir Jeremy was a member of the IPPR Commision on National Security in the 21st Century.