Harriet Moynihan

Associate Fellow, International Law Programme

Headshot of Harriet Moynihan


Harriet is an associate fellow in the International Law Programme at Chatham House, of which she was formerly acting director. She has worked on international law issues for over 20 years in a number of capacities, including as an academic, in government, and in private practice.

Harriet’s work focuses on the application of international law to new technology, including cyber operations, social media and AI. Harriet also works on China’s approach to the international legal order, and on business and human rights. She has researched and published widely at Chatham House, particularly on technology governance, on which topic she has given evidence to the UK House of Commons Foreign Affairs Committee. Harriet also designs and delivers capacity-building exercises on the application of international law to cyberspace, and is a consultant at the Centre for Political and Diplomatic Studies. Additionally, she is a director of the charity Duchenne UK.

Prior to joining Chatham House, Harriet was a legal adviser at the UK Foreign and Commonwealth Office, where she advised on a wide range of international law issues. Before that, Harriet trained and worked as a competition lawyer at Clifford Chance LLP in the firm’s London and Singapore offices.

Past experience

2021-22Acting director, International Law Programme, Chatham House
2020-21Senior research fellow, International Law Programme, Chatham House
2015-20Associate fellow, International Law Programme, Chatham House
2019Visiting fellow, Mansfield College, Oxford
2019Visiting research fellow, Bonavero Institute of Human Rights, University of Oxford
2013-15Masters in international human rights law, New College, University of Oxford
2004-12Assistant legal adviser, Foreign & Commonwealth Office
2003-04Postgraduate diploma in competition law, Kings College, London
2001-04Associate solicitor, Clifford Chance LLP
1994-97MA (Hons) classics, Trinity Hall, University of Cambridge