Marièle Coulet-Diaz

Partner, Mexico City



Marièle Coulet-Diaz is a partner in the Global International Arbitration Practice Group in Mexico City. Prior to joining the Mexico City office, Marièle practiced for several years in the firm's Paris office. Marièle specializes in commercial and investment arbitration. Industry sectors in which she has advised include construction, energy, infrastructure, telecommunications and corporate disputes. Marièle also teaches international arbitration at the University of Sorbonne Paris-Nord. She is both common-law and civil law qualified.

Prior to joining White & Case, Marièle worked for several years in the corporate and arbitration departments of major international law firms in Paris. While Marièle's practice focuses exclusively on arbitration, her personal experience with corporate and transactional work gave her a strong understanding of the environment in which companies operate.

A native of France and Guatemala, Marièle is multilingual in French, Spanish, and English. She performs written and oral advocacy in all these languages. She has lived, studied and/or worked in France, Guatemala, Mexico and the United States.

Bars and Courts
New York
University of California, Berkeley
Magistère Juriste d'Affaire - DJCE
University of Paris II Panthéon-Assas
Master 2, Corporate Law
University of Paris II Panthéon-Assas
Master 1, Business and International Law
University of Paris II Panthéon-Assas


Representing a European company in an investor-State arbitration against a Latin American country in the telecommunications sector;

Representing a South American investor in an investor-State arbitration related to the energy sector;

Representing a European construction company in an ICC arbitration arising out of a bridge construction project in Central America;

Representing a consortium of construction companies in one of the world's largest infrastructure projects located in Central America in related ICC arbitrations;

Representing the seller in a corporate M&A dispute in ICC arbitration proceedings, regarding price adjustment and representations and warranties indemnification;

Representing a contractor in an ICC arbitration concerning the termination of a major infrastructure project in North Africa;

Representing an Asian State entity in connection with ICC arbitrations arising from military procurement contracts and the payment of illicit commissions;*

Representing a South American State in an UNCITRAL arbitration arising from the nationalization of a company operating airports;*

Representing a South American State in an UNCITRAL arbitration arising from nationalizations in the mining sector;* and

Representing a Brazilian company in an ICC arbitration relating to fraudulent schemes implemented within a multi-party and multi-contract framework in the finance sector.*

*Experience prior to joining White & Case in 2016.


Co-author, "Hardship and Climate Change", Energy, Oil & Gas, Summer 2020 (with Elizabeth Oger-Gross and Kirsten Odynski)

Co-author, "Hardship and climate change: How to draw-up climate-resilient contracts", Business Green, 4 May 2020 (with Elizabeth Oger-Gross and Kirsten Odynski)

Co-author, "Rethinking hardship clauses in times of changing climate", Environmental Law & Management, January 2020 (with Elizabeth Oger-Gross and Kirsten Odynski)

Co-author, "The New Assistance the ICC Provides to Protect the Confidentiality of a Sealed Offer," 2017, ICC Dispute Resolution Bulletin, Issue 1 (with Cristopher Seppälä and Paul Brumpton)

Author, "Comentario de la decisión de la Corte de casación, No. U 11-17.196, del 15 de enero 2014, Panorama de Jurisprudencia Francesa, Revista del Club Español del Arbitraje, 2016

Co-author, "GAR Know-How: Investment Treaty Arbitration Review: Singapore," 2015, Global Arbitration Review (with Mark Mangan)