Research Director, International Security
Patricia Lewis

Contact information

+44 (0)207 314 2770


Dr Patricia M Lewis is the Research Director, International Security at Chatham House. Her former posts include Deputy Director and Scientist-in-Residence at the Center for Non-proliferation Studies at the Monterey Institute of International Studies; Director of UNIDIR; and Director of VERTIC in London.  

Dr Lewis served on the 2004-6 WMD Commission chaired by Dr Hans Blix; the 2010-2011 Advisory Panel on Future Priorities of the OPCW chaired by Ambassador Rolf Ekeus; and was an adviser to the 2008-10 International Commission on Nuclear Non-proliferation and Disarmament (ICNND) chaired by Gareth Evans and Yoriko Kawaguchi.

She holds a BSc (Hons) in physics from Manchester University and a PhD in nuclear physics from the Birmingham University. She is a dual national of the UK and Ireland.

Dr Lewis is the recipient of the American Physical Society’s 2009 Joseph A Burton Forum Award recognizing 'outstanding contributions to the public understanding or resolution of issues involving the interface of physics and society'.

Areas of expertise

  • International security/relations/treaties
  • Defence policy
  • Science and technology policies
  • Weapons of mass destruction (nuclear, chemical and biological) and conventional armaments
  • Arms control, non-proliferation and disarmament

Past experience

2016 -Member, High Level Experts on Space Group, European External Action Service
2012 -Member, International Advisory Board, The Centre for Nuclear Non-proliferation and Disarmament
2008 - 2012Deputy Director and Scientist-in-Residence, James Martin Center for Nonproliferation Studies, Monterey Institute of International Studies, Middlebury College, USA
1997 - 2008Director, United Nations Institute for Disarmament Research (UNIDIR), Geneva, Switzerland
1989 - 1997

Director, Verification Training, Research and Information Centre (VERTIC), UK