Essex Court Chambers

Matthieu Gregoire specialises in commercial litigation, international commercial arbitration, and investor-state arbitration.

Matthieu’s clients include governments, corporations and individuals.  His practice covers a wide range of sectors, including oil and gas, renewable energy, mining, manufacturing and finance.  Many of his cases give rise to issues of civil fraud.

Matthieu has:

Acted and/or advised in matters before all levels of English courts, in commercial and international disputes. Acted and/or advised in numerous investment treaty arbitrations, brought across many sectors and pursuant to a wide array of investment treaties, with experience of most major arbitration rules (including ICSID, SCC, UNCITRAL and ad hoc rules).  Matthieu’s recent experience includes disputes under the OIC Investment Agreement and intra-EU BITs. Acted and/or advised in numerous commercial arbitrations, with experience of most major arbitration rules (ICC, LCIA, SCC, UNCITRAL), across a broad range of sectors and industries, and covering a variety of foreign laws as the applicable law. Advised States, non-governmental organisations, private commercial entities and private individuals on a diversity of commercial, arbitration and public international law issues, including treaty interpretation, WTO/Trade law, and implications of Brexit.  Matthieu was appointed to the Attorney General’s Public International Law C Panel of Counsel in 2017.

2017: Appointed to the Attorney General’s C PIL Panel

2015-onwards: Adjunct Professor of International Commercial Arbitration, Pepperdine University, London

2013: Call in England & Wales      

2011-2012: Associate, International Arbitration and Public International Law, Cleary Gottlieb Steen & Hamilton (Paris)

2011: Call in New York

2010: LLM, Georgetown University, D.C.

2010: Masters in Intentional Political Economics, Sciences Po, Paris

2008: BA in Law, Jesus College, University of Cambridge