Ari MacKinnon

Cleary Gottlieb Steen & Hamilton LLP

Ari D. MacKinnon’s practice focuses on disputes matters in Latin America with a particular emphasis on international arbitration and corruption issues. Ari joined the firm in 2009 and became a partner in 2015.

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 arbitration and corruption-related reviews in both English and Spanish.


International Arbitration

  • A major Latin American oil and gas company in the successful prosecution of a Spanish-language IACAC arbitration relating to a concession agreement governed by Peruvian law.
  • Latin American affiliates of international oil and gas companies in an ongoing ICC arbitration in New York relating to the interpretation of a gas sales agreement.

Enforcement and Investigations

  • An international financial institution in parallel investigations being conducted by, among others, the UK Financial Conduct Authority, the U.S. Department of Justice, and the U.S. Commodity Futures Trading Commission, relating to the FX market; also counsel to the same institution in regulatory investigations in the U.S. related to the setting of the ISDAFIX.
  • FCPA and corporate governance advice to a Mexican construction company in connection with an investigation by the CNBV and potential investigation by the SEC.

Other Litigation

  • BNP Paribas in clawback actions brought by the Trustee of the Madoff Estate in connection with the Bernie Madoff Ponzi scheme.
  • Alpha Natural Resources and certain of its directors and officers in a successful motion to dismiss a federal securities law class action brought under Section 11 of the Securities Act.


  • New York University School of Law, J.D., 2006
  • Middlebury College, M.A., 2003
  • Grinnell College, B.A., 2002


  • New York
  • U.S. Court of Appeals for the Second Circuit
  • U.S. District Court, District of Colorado


Rate : $$$

What types of cases Attorney Ari MacKinnon & Cleary Gottlieb Steen & Hamilton LLP can handle?
Cleary Gottlieb Steen & Hamilton LLP can handle cases related to laws concerning Litigation, Lawsuits & Disputes, Appeals, White Collar Crime, International Law. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Cleary Gottlieb Steen & Hamilton LLP located?
Cleary Gottlieb Steen & Hamilton LLP is located at 1 Liberty St, New York, NY 10006, USA. You can reach out to Cleary Gottlieb Steen & Hamilton LLP using their phone line (212) 225 2243. You can also check their website or email them at [email protected].
How much would it cost to hire Cleary Gottlieb Steen & Hamilton LLP?
Ari MacKinnon lawyer charges are specific to each case. However, they work with contingency fees and its ranges from $$ to $$$. They also provide free consultation [and no obligation quotes] if you are interested to hire.
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Cleary Gottlieb Steen & Hamilton LLP
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