Nicholas Renzler

Associate - Washington, D.C.

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202.467.9694 Download vCard

Nick Renzler is an associate in the firm's International Litigation and Arbitration Department. His practice focuses on State-State and investor-State disputes in front of the world's principal dispute resolution bodies, with a particular focus on environmental and public policy issues. He also represents foreign sovereigns before U.S. courts and advises corporations on human rights and rule of law matters.


  • University of Geneva, Faculty of Law, Certificate in International Water Law and Law of Transboundary Aquifers, 2016
  • Harvard Law School, J.D., cum laude, 2012
  • Brown University, A.B. in Development Studies, magna cum laude, departmental honors, 2007


Spanish, Portuguese

Representative Experience

Litigation before the International Court of Justice

  • Somalia v. Kenya (Case Concerning Maritime Delimitation in the Indian Ocean). Representing Somalia in a dispute with Kenya regarding the Parties' maritime boundary.          
  • Qatar v. United Arab Emirates (Case Concerning Application of the International Convention on the Elimination of All Forms of Racial Discrimination). Representing the State of Qatar in a proceeding arising from breaches of the ICERD by the UAE.
  • Costa Rica v. Nicaragua (Case Concerning Maritime Delimitation in the Caribbean Sea and the Pacific Ocean). Represented Nicaragua in a dispute with Costa Rica regarding the Parties’ maritime boundaries.
  • Ecuador v. Colombia (Case Concerning Aerial Herbicide Spraying). Represented Ecuador in a dispute regarding Colombia's aerial spraying of toxic herbicides in close proximity to the Ecuadorian border, causing serious harm to human health, livestock, crops and the environment in Ecuador. 
  • Costa Rica v. Nicaragua (Case Regarding Navigational and Related Rights). Represented Nicaragua in a dispute regarding sovereignty over the San Juan River, which constitutes the border between the two States, the right to regulate navigation on the river, and the lawfulness of Nicaragua's regulations.

Litigation & Arbitration Between Sovereign States

  • Philippines v. China. Represented the Philippines in an ad hoc arbitration pursuant to Annex VII of the United Nations Convention Law of the Sea regarding maritime jurisdiction and violations of the UN Convention on the Law of the Sea in the South China Sea. The Tribunal rejected China’s claim to “historic rights” in the maritime areas encompassed by its so-called “nine-dashed line” as inconsistent with the U.N. Convention on the Law of the Sea, and found that China violated the Philippines' sovereign rights under the Convention.
  • Ghana v. Côte d'Ivoire. Represented Ghana in a dispute before a Special Chamber of the International Tribunal of the Law of the Sea regarding the Parties' maritime boundary.

Investor-State Arbitration

  • Chevron Corp. & Texaco Petroleum Corp. v. Republic of Ecuador. Representing Ecuador in an UNCITRAL Rules arbitration regarding a $9.5 billion judgment issued by an Ecuadorian court against Chevron for pollution and human health damages in the Ecuadorian Amazon.
  • Philip Morris Brands Sàrl, et al. v. Oriental Republic of Uruguay. Represented Uruguay in a dispute under the Switzerland-Uruguay BIT regarding Uruguay’s regulation of cigarette packaging and health warnings. The Tribunal unanimously rejected the Claimants' challenge to Uruguay’s progressive tobacco-control measures, aimed at reducing cigarette consumption and its devastating impact on public health. It also rejected the Claimants' denial of justice claims.
  • Niko Resources (Bangladesh) Ltd. v. Bangladesh Petroleum Exploration & Production Co. Ltd., et al. Representing the Bangladeshi state-owned oil and gas company, and a subsidiary, in a contractual dispute regarding a natural gas well blow-out.

International Advisory Matters

  • Advised a South Pacific nation on implementing certain obligations under the United Nations Convention on the Law of the Sea. 
  • Advised a European nation on maritime boundary delimitation issues.
  • Advised two Latin American states on extradition matters related to public corruption.

Foreign Sovereign Representation in U.S. Courts 

  • Represents the Kingdom of Spain in opposing requests for the confirmation, recognition and enforcement of arbitral awards in U.S. courts.
  • Africa Growth Corporation v. Republic of Angola. Representing Angola in two lawsuits stemming from the alleged expropriation of an apartment complex in Luanda.
  • Valambhia v. United Republic of Tanzania. Representing Tanzania in an action in the District of Columbia seeking the recognition of a judgment rendered in Tanzania.
  • Bardales v. Consulate of Peru in New York. Representing the Consulate of Peru and former Consul General in an employment dispute.
  • Securesoft Technologies LLC v. Embassy of Ghana. Represented the Ghanaian Embassy in the United States in a contract dispute before a U.S. court.
  • Arch Trading Corp. v. Republic of Ecuador. Represented Ecuador in successfully asserting a sovereign immunity defense before a U.S. court. 
  • Sequeira v. Nicaragua. Represented Nicaragua and individual government officials before a U.S. court.
  • Skanga Energy & Marine Ltd. v. Petroleos de Venezuela S.A. Represented a state-owned oil company in asserting a sovereign immunity defense before a U.S. court.

Professional Experience

  • Lecturer in Law, Northeastern University School of Law (Fall 2018)
  • Legal Intern, Office of the Legal Adviser, United States Department of State (Summer 2011)


  • Cravath International Fellow, Harvard Law School
  • Chayes International Public Service Fellow, Harvard Law School
  • Associate, Watson Institute for International Studies, Brown University
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Bar Admissions

  • District of Columbia
  • New York

Court Admissions

  • U.S. District Court for the Southern District of New York
  • U.S. District Court for the District of Columbia
  • Supreme Court of the United States
  • U.S. Court of Appeals for the District of Columbia Circuit