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Oliver (Ollie) J. Armas

Office Managing Partner
New York

Oliver (Ollie) J. Armas

Ollie is the Managing Partner of our New York office. He is sought out by our clients around the world to resolve some of their most complex and delicate matters in domestic and foreign litigation, before-arbitration tribunals, and to conduct sensitive internal investigations.

In just the past year, Ollie represented a client in a US$1 billion putative RICO class action, a Saudi agent against its Argentine principal in a US$100 million+ ICC arbitration, a Brazilian owner in three international construction arbitrations totaling almost US$1 billion in claims, a U.S. healthcare provider in an AAA "mass arbitration" brought by multiple doctors, the Government of Mongolia in defending enforcement of an UNCITRAL and Energy Charter Treaty arbitration award (involving the U.S. Foreign Sovereign Immunities Act), and a U.S.-based client in a FCPA investigation in Latin America.

Ollie leads a multilingual, multicultural team that prides itself on its creative, tenacious approaches to resolving client disputes. The team focuses on energy - oil and gas, power, nuclear, renewables; mining; engineering; manufacturing; licensing; commodities; franchising; agency disputes; financial products and services; M&A (including purchase price and working capital adjustments, and earn outs); shareholder issues; joint ventures; hospitality; electronics; technology; transportation; and pharmaceutical and life sciences.

Ollie has handled arbitrations under the rules of many of the major arbitral institutions, including the ICC, AAA/ICDR, LCIA, ICSID, HKIAC, SIAC, SMA, LMAA, DIAC, and the DIFC. He is also a highly sought after arbitrator. Fluent in Spanish, and with an understanding of Portuguese, he routinely counsels clients on matters involving Latin America. He has acted as a legal advisor in certain aspects of U.S. law in Mexico and Peru, and he has supervised litigation and conducted FCPA investigations in almost every country in Latin America.

"Highly analytical and provides key strategic advice."

The Legal 500

Representative Experience

Defended a Brazilian mining and metals company in alleged product defect litigation in Missouri concerning materials imported to the United States.

Defended an Argentine oil company in a New Jersey litigation relating to environmental contamination and supposed fraudulent conveyances.

Obtained a defense verdict in the Southern District of New York for a U.S. asset-based lender against an Italian clothes manufacturer (Diesel).

Represented Cayman-based and UK-based investment funds in litigation in Brazil, Bermuda, and Uruguay related to restructuring of debentures.

Represented an owner in an ICC construction arbitration in Panama with its EPC contractor.

Represented an Abu Dhabi-based owner in an UNCITRAL arbitration regarding the construction of a hotel development in Mexico.

Represented a global pharmaceutical company in an AAA arbitration involving a development and license agreement dispute.

Represented a Peruvian investor in a tax refund arbitration with the Government of Peru.

Represented a U.S. electric utility company in a JAMS arbitration regarding a merger transaction.

On behalf of a Chinese parent, conducted an internal investigation of its Latin American subsidiaries for potential FCPA violations.

Represented a U.S. pharmaceutical in an internal investigation regarding judicial corruption in Mexico.

Education and admissions


  • J.D., New York University School of Law, 1990
  • M.P.A., with honors, New York University, Wagner Graduate School of Public Administration, 1987
  • B.A., with honors, New York University, College of Arts and Sciences, 1986


  • Member, American Bar Association
  • Member, New York State Bar Association (International Law Section, Chair 2007 and current member of its Executive Committee)
  • Member, Association of the Bar of the City of New York (International Commercial Disputes Committee)
  • Member, International Bar Association
  • Member, USCIB of the International Chamber of Commerce
  • Member, London Court of International Arbitration (the North American Users' Council and the Latin American Users' Council)
  • Member, New York International Arbitration Club
  • Advisory Committee, Swiss Arbitration Academy (SAA)
  • Advisory Committee, Argentine Commission of National and Transnational Arbitration (CARAT)
  • Member, ALARB
  • Roundtable Group Roster of Experts

Bar admissions and qualifications

  • New York

Court admissions

  • U.S. District Court, Southern District of New York
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, District of Hawaii


Chambers Global


Chambers USA


Chambers Latin America


Benchmark: Litigation (NY Star; Products Liability and General Commercial)


The Legal 500


Who's Who of International Arbitration


Guide to the World's Leading Experts in Commercial Arbitration


Who's Who of International Litigation


Super Lawyers

Latest thinking and events

Published Works

Hague Convention on Choice of Court Agreements Adds Option For Drafting of Dispute Resolution Clauses

Inside Counsel

Published Works

International Execution against Judgment Debtors - Mexico Chapter

Thomson Reuters Westlaw

Published Works

International Commercial Arbitration in New York

(James H. Carter and John Fellas, co-editors)
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