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Latin America Guide - also see Chambers Global
Individual Profile

Néstor Méndez

Pietrantoni Méndez & Alvarez LLC - San Juan

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  • Popular Centre, 19th Floor
  • San Juan, San Juan, Puerto Rico
  • 00918

Profile submitted by Néstor Méndez

Practice Areas

Mr. Mendez concentrates his practice in complex commercial dispute resolution, including class actions and international arbitrations in such areas as antitrust, consumer law, contractual disputes, financial institutions, governmental regulation, intellectual property, products liability, securities and telecommunications. He has been lead or co-counsel before the FTC and the Antitrust Division of the Puerto Rico Department of Justice in obtaining approval for the leading mergers in Puerto Rico during the last two decades and successfully represented clients in investigations and regulatory actions by said entities and other agencies, including the Securities and Exchange Commission, the Puerto Rico Commissioner of Financial Institutions and the Puerto Rico Department of Consumer Affairs, among others. He is currently lead or co-lead defense counsel in a dozen class and putative class actions including a Multidistrict Litigation (MDL) toxic tort class action; three securities class actions in Federal Court related to alleged losses in Puerto Rico closed-end funds; a RICO class action involving the supply of fuel to the Puerto Rico Power Authority, three putative consumer class actions in Puerto Rico State Court in the telecommunications area, and four putative class actions in said State Court against major financial institutions, involving alleged violations of the Puerto Rico Insurance Law, the Puerto Rico Antitrust Law and local securities laws. He has successfully argued leading cases in the areas of securities, antitrust, financial institutions, and governmental regulation before the First Circuit Court of Appeals. He also obtained a multi-million award in an international arbitration involving a contractual dispute and is currently lead counsel in an appeal of an NLRB decision before the D.C. Circuit Court of Appeals; He is also defending three major broker-dealers in hundreds of FINRA arbitrations, arising from the Puerto Rico debt crisis.

Professional Memberships

Mr. Mendez is President of the Board of Trustees of the Puerto Rico Supreme Court Foundation, Trustee of the U.S. Supreme Court Historical Society, a Director and former President of the Board of Directors of the Foundation of the Federal Bar Association and Chair of its Fellows Program. A long-time member of the FBA, the ABA and the International Trademark Association Mr. Méndez has been Adjunct Professor of the University of Puerto Rico and Interamerican University Law Schools and an arbitrator before the International Court of Arbitration and the American Arbitration Association, including as Panel Chairman.


Mr. Mendez was a senior Litigation Partner in McConnell Valdes where he chaired the Antitrust and Trade Regulation group, the Business Development and Recruiting Committee and led the Securities Litigation practice, until he founded the Pietrantoni Mendez & Alvarez firm in 1992. He is the only Puerto Rico lawyer to have received a top ranking from Chambers Global in Dispute Resolution for twelve years in a row and is one of only two lawyers with a top ranking for Dispute Resolution in the 2018 Chambers Latin America Guide, where he has been described as the gold standard for litigation. He is also a Best Lawyer in Puerto Rico in Litigation and International Arbitration for Best Lawyers of America, which named him lawyer of the year in 2017.


Mr. Mendez has published various articles, including a law review article on immunity from the Puerto Rico Antitrust Law for regulated industries, two articles and on products liability law in Puerto Rico and co-Authored the Chambers Global and Litigation Guide for Puerto Rico.


Attended the Wharton School of the University of Pennsylvania (BE, 1970); University of Puerto Rico Law School (JD, Magna Cum Laude, 1973 and Associate Editor of the Law Review) and Harvard Law School (LLM, 1976). Admitted to the U.S. Supreme Court, the U.S. Court of Appeals for the First Circuit; the U.S. Court of Appeals for the D.C. Circuit; the U.S. District Court for the District of Puerto Rico; and the Puerto Rico Supreme Court, to which he was admitted with the highest grade in his Bar Exam.