Dr Kate Parlett > Twenty Essex > London, England > Lawyer Profile

Twenty Essex
Twenty Essex

Work Department


Kate specialises in public international law and international arbitration.

She acts for States and private entities on matters covering land and maritime boundaries, investment treaty and contract disputes, international trade law, human rights, law of the sea, State responsibility, treaty obligations, immunities, transboundary environmental harm, sanctions and international crimes. Kate regularly appears as an advocate before the International Court of Justice (ICJ).

Kate represents States and investors in investment treaty arbitrations, under the ICSID and UNCITRAL rules. She has also advised clients on how to structure their investments to take advantage of protections offered by investment treaties and foreign investment laws.

She has experience in international commercial arbitrations under the ICC, LCIA and Stockholm Chamber of Commerce rules.

Kate also sits as arbitrator.

She has taught public international law, international investment and commercial arbitration, and international human rights law at the universities of Cambridge, Paris-II (Panthéon-Assas), Queen Mary (University of London), Queen’s University (Canada), Queensland and at the Graduate Institute in Geneva. Kate is ranked as a ‘Future Leader’ in the 2018 arbitration list and as a 2018 ‘UK Bar: Rising Star’ by Who’s Who Legal.


Year of call: 2015 (Bar of England and Wales); 2010 (Solicitor, England and Wales); 2005 (Solicitor, Australia)


French (conversational)


  • Attorney General’s Public International Law B Panel (2017–2022)
  • British Institute of International and Comparative Law: member of the Public International Law Advisory Panel
  • Commonwealth Secretariat on Oceans and Natural Resources: consultant expert panel
  • Cambridge Journal of International and Comparative Law: Academic Review Board
  • International Law Association (ILA) (Australian Branch) and member of the ILA Study Group on Individual Responsibility in International Law
  • American Society of International Law
  • ICDRYoung & International: Global Advisory Board (2017–2020)
  • ICC Young Arbitrators Forum
  • Young Institute for Transactional Arbitration
  • Young International Arbitration Group
  • Young International Congress and Convention Association
  • Young SIAC
  • Commercial Bar Association


  • University of Cambridge: PhD in Public International Law (2009)
  • University of Cambridge: Master of Laws in International Law, First Class (2005)
  • University of Queensland: Bachelor of Laws, First Class (2001)
  • University of Queensland: Bachelor of Arts, Major in History (1999)

Lawyer Rankings

London Bar > Public international law

(Leading Juniors) Ranked: Tier 2

Kate ParlettTwenty EssexShe has a fantastic grasp of ECHR jurisprudence, and a depth of knowledge of PIL issues.