Ari D MacKinnon

Ari D. MacKinnon’s practice focuses on international arbitration in Latin America, with a particular emphasis on matters relating to the oil & gas, mining and infrastructure sectors, as well as ESG- and corruption-related issues.

Ari has successfully represented a number of major Latin American oil and gas, energy, infrastructure, and pulp and paper companies, as well as other clients in disputes in the region. He speaks regularly in Latin America on topics related to arbitration and crisis management. Ari has experience conducting arbitrations in both English and Spanish.

Ari joined the firm in 2009 and became a partner in 2015. J.D., New York University School of Law (2006); M.A., Middlebury College (2006); B.A., Grinnell College (2002).

Member, New York Bar.

Member, Program Committee, New York International Arbitration Center.

Member, Chartered Institute of Arbitrators

Included on Arbitrator Roster, Arbitration Centre of the Lima Chamber of Commerce

Member, New York City Bar Association Council on International Affairs

Member, International Arbitration Club of New York

Member, Association of International Petroleum Negotiators

“The Conversation Continues: Second Circuit Grapples with Consumer Arbitration Agreements,” Cleary Gottlieb Alert Memorandum, March 26, 2025

“GE Energy Power Conversion France SAS Corp v. Outokumpu Stainless USA, LLC (2020): Application of U.S. Domestic Arbitration Law to Non-Signatory Enforcement of International Arbitration Agreements, and Other Potential Impacts of Domestic Arbitration Doctrines in International Contexts,” U.S. Supreme Court Precedents on Arbitration: Shaping the American Arbitration Law and Practice, Brill Nijhoff, March 2025

“Arbitrator Conflicts of Interest in Latin American Arbitration,” Cleary Gottlieb Alert Memorandum, February 3, 2025

“International Arbitration Trends and Topics for 2025,” Cleary Gottlieb Alert Memorandum, January 6, 2025

“Second Circuit Holds Section 1782 Discovery Is Not Available In An ICSID Arbitration,” Cleary Gottlieb Alert Memorandum, July 24, 2024

“U.S. Supreme Court Rules That Judges, Not Arbitrators, Decide If A Dispute Is Arbitrable When Multiple Agreements Conflict On The Question,” Cleary Gottlieb Alert Memorandum, May 28, 2024

“International Bar Association Publishes Revisions to Guidelines on Conflicts of Interest in International Arbitration,” Cleary Gottlieb Alert Memorandum, March 8, 2024

“Five International Arbitration Trends and Topics for 2024,” Cleary Gottlieb Alert Memorandum, January 4, 2024