Harriet Moynihan

Associate Fellow, International Law Programme

Headshot of Harriet Moynihan


Harriet’s research focuses on the role and application of international law in responsible state behaviour in cyberspace. Harriet regularly writes and speaks on these issues, and is the author of Chatham House’s research paper The Application of International Law to State Cyberattacks: Sovereignty and Non-intervention

Harriet also works on the role of international human rights law in internet governance, and was a visiting research fellow at the Bonavero Institute of Human Rights, and Mansfield College, University of Oxford, in 2019. Harriet’s other research interests include China and international law, and business and human rights.

Prior to joining Chatham House, Harriet was a legal adviser at the UK Foreign and Commonwealth Office from 2004–12, where she advised on a wide range of public international law issues and represented the UK on legal issues in bilateral and international fora. Before that, Harriet was a competition lawyer at Clifford Chance LLP, where she worked in the firm’s London and Singapore offices.

Past experience

2021-22 Acting director, International Law programme, Chatham House
2020-21 Senior research fellow, International Law programme, Chatham House
2015-20 Associate fellow, International Law programme, Chatham House
2019 Visiting fellow, Mansfield College, Oxford
2019 Visiting research fellow, Bonavero Institute of Human Rights, University of Oxford
2013-15 Masters in International Human Rights Law, New College, University of Oxford
2004-12 Assistant Legal Adviser, Foreign & Commonwealth Office
2003-04 Postgraduate Diploma in Competition Law, Kings College, London
2001-04 Associate Solicitor, Clifford Chance LLP
1994-97 MA (Hons) Classics, Trinity Hall, University of Cambridge