Mariles Toledo

Ivana Mariles Toledo

Washington, DC

I help protect my client’s interests before leading international dispute resolution bodies.

Ivana Mariles Toledo advises and represents sovereign States and State-owned entities on matters of public international law and international investment law.

Ivana’s practice focuses on representing States and state entities in investment arbitration, international commercial arbitration and disputes under public international law. She has experience representing clients under the arbitration rules of the International Centre for Settlement of Investment Disputes (ICSID), the United Nations Commission on International Trade Law (UNCITRAL) and the Chambre d'Arbitrage Internationale de Paris (CAIP).

Prior to joining Foley Hoag, Ivana Mariles Toledo completed a legal internship with ICSID in Washington, D.C. where she assisted the Spanish Case Management Team. She also completed a legal internship with the Litigation and Arbitration Department of Petróleos Mexicanos (PEMEX) in Mexico City, where she worked on multiple international commercial arbitrations in both English and Spanish languages.


  • University of Houston Law Center, J.D., 2020
  • The University of Texas at Austin, B.A., 2016

Bar and Court Admissions

  • District of Columbia


  • Represents India in a confidential UNCITRAL arbitration concerning certain regulatory measures imposed on an Indian telecom company.
  • Quanta Services Netherlands B.V. v. Republic of Peru. Represents the of Republic of Peru in an ICSID dispute brought by Quanta Services’ Houston-based Dutch subsidiary under the auspices of the Peru-Netherlands Bilateral Investment Treaty, concerning the termination of contracts for the design, construction and operation of telecommunication networks in rural areas of Peru.
  • Desarrollo Vial de los Andes S.A.C. v. Republic of Peru. Represents the Republic of Peru in an ICSID arbitration based on a contract for the improvement of the Central Highway of Peru and as a result of the suspension of a toll station due to social protests.
  • Consorcio GLP Ecuador v. Republic of Ecuador. Represents Ecuador in an arbitration brought by a Spanish company under the UNCITRAL Rules in relation to the installation and activation of a deposit and transport system for liquefied petroleum gas at a maritime terminal. 
  • Represents a Sovereign state in an investment arbitration relating to a renewable energy project.
  • Metropolitan Municipality of Lima v. Línea Amarilla S.A.C. Represents the Metropolitan Municipality of Lima in an arbitration under the International Chamber of Arbitration of Paris (CAIP). The arbitration arises out of a contract for the construction, operation and maintenance of a toll road in Lima.
  • Constructora Makro S.A. de C.V. v. Ministry of Transportation and Infrastructure of the Republic of Nicaragua. Represented the Republic of Nicaragua in an UNCITRAL arbitration based on two contracts for the improvement of certain road sections.
  • Advises the Government of Peru in the extradition of former President Alejandro Toledo related to charges of bribery and money laundering resulting from the Odebrecht bribery scheme.

Honors & Involvement

  • Foley Hoag Women Associates Affinity Group, Co-Chair