Admitted to the Portuguese Bar and the Brazilian Bar, Isabela Lacreta is an associate in the International Arbitration practice of the Paris office.

She regularly represents clients in commercial and investment arbitrations arising from different economic sectors and industries, namely energy and constructions projects and commercial agreements. She has acted as counsel for states, investors and companies in over a dozen international arbitrations conducted under the ICSID, ICC, UNCITRAL, ICDR and CAM-CCBC rules. Isabela has also acted as administrative secretary of arbitral tribunals in a number of cases. 

Isabela is currently pursuing a PhD in law as part of a double degree program between the Universidade de São Paulo and the Université Paris Nanterre. Her thesis focuses on the determination of the law applicable to arbitration. She has published a number of articles on international arbitration.

Isabela has been recognized in legal publications such as Who’s Who Arbitration: Future Leaders, with sources naming her as “one of the most prominent young practitioners in the field” and noting that her “dedication to the cases, analytical skill and sharp thinking are widely acknowledged by the market” (2020), and that she “stands out as excellent at all areas of arbitration law” and has “years of experience in both international and domestic cases” (2019).

 Isabela joined Mayer Brown in 2021. Previously, she was an attorney in the International Arbitration group of an international firm in Paris. Before that she practiced at a boutique dispute resolution firm based in São Paulo (Brazil).

In addition to her native Portuguese, Isabela is fluent in English, Spanish and French.

Spoken Languages

  • English
  • French
  • Portuguese
  • Spanish


University of São Paulo Law School, supervised by Prof. Carlos Alberto Carmona
Université Paris Nanterre (double degree) – supervised by Prof. Claire Debourg
Doctor of Juridical Science (Ph.D.) in Civil Procedure Law

University of Paris II Panthéon-Assas, Professional Masters on Litigation, Arbitration and ADR

University of Paris II Panthéon-Assas, Diplôme Supérieur d’Université – International Private Law

Pontifical Catholic University of São Paulo (PUC-SP), Graduation Thesis under Prof. Claudio Finkelstein’s supervision Theme: “Dispute Boards – the mandatory nature of their decision”


  • Brazil
  • Portugal


  • Admitted to practice in Brazil since 2011.
  • Admitted to practice in Portugal since 2019.
  • Member of the Arbitrator List of the Brazilian Center of Mediation and Arbitration (CBMA).
  • Member of the Brazilian Arbitration Committee (CBAr).
  • Member of the Brazilian Chapter of the Club Español del Arbitraje (CEA).
  • Member of young practitioners groups: ICC YAF, Inovarb (Amcham Brasil), Young ICCA, CEA-40, LATAP.