With pronounced experience in Latin America–related arbitrations and state-side ISDS, Cleary Gottlieb Steen & Hamilton houses a full service investment treaty and commercial arbitration group, frequently representing sovereign states and multinational corporates. Spearheading the group is Ari MacKinnon, who excels in energy and natural resources matters, Spanish-language proceedings, and for advising on procedural issues in Latin American arbitration. Jeffrey Rosenthal is a key player in arbitration-related court proceedings and enforcement, including post-award strategy and parallel litigation before US courts. Carmine Boccuzzi places strong emphasis on disputes involving foreign sovereign states and state-owned entities. Katie Gonzalez is a key member of the team. All lawyers mentioned are in New York.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Cleary’s technical capability is outstanding. The team stands out for its unparalleled expertise in complex cross-border matters and high-stakes international disputes. Team integration is highly efficient, enabling sophisticated coordination across jurisdictions. The lawyers are consistently fast, pragmatic, and deeply technical.’
‘Lisa Vicens and Jeffrey Rosenthal consistently stand out for their exceptional legal judgment, strategic insight, and client-focused approach. They combine deep technical mastery with clarity, responsiveness, and a strong understanding of commercial matters.’
‘Tremendous talent ready to handle the most complex cases.’
‘A deep bench of well-rounded talent. In particular Jeffrey Rosenthal who is a creative, tireless advocate, practical and finds workable connections across strategic impasses. Katie Gonzalez is a quick thinker, relentless, efficient.’
‘The best lawyers I have ever seen.'
'Smart, proactive and experienced.'
Key clients
- Pluspetrol Resources Corporation, S.A.
- Thales Avionics, Inc. (U.S.A)
- The Resource Group International Limited, Mohammed Khaishgi, Hasnain Aslam
- The Resource Group International Limited (“TRG-I”)
- financial right claims GmbH (“FRC”)
- Genesis Global Capital, LLC (“Genesis”)
- Maple Leaf Sports & Entertainment
- Oleoducto de Crudos Pesados Ltda.
- MHC Receivables LLC, FNMB LLC, and Credit Asset Sales LLC
- The Republic of Argentina
Work highlights
Represented a U.S. subsidiary of French aerospace company Thales S.A. in an ICC arbitration involving claims that its joint venture partner, subsidiary of L3Harris Technologies, Inc., breached the right of first refusal provision in the joint venture contract when agreeing to sell its interest in the joint venture to a third party.
Acting for Pluspetrol Resources Corporation in a Spanish-language ICC arbitration against Perupetro concerning the allegedly wrongful termination of a License Contract for the exploration and exploitation of hydrocarbons at Block 8 in Peru.
Representing Bermuda technology investment company, The Resource Group International Limited (“TRG-I”), in an ongoing dispute against TRG-I’s former founder and CEO, Zia Chishti, who resigned from his position following Congressional testimony by a former employee in support of the adoption of Chapter 4 of the FAA.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Katie Gonzalez
Practice head
Ari MacKinnon; Jeffrey Rosenthal
Other key lawyers
Carmine Boccuzzi; Katie Gonzalez; Lisa Vicens