Maceira Zayas is a law firm headquartered in San Juan, Puerto Rico, with an office in Washington, D.C.

The firm advises corporations, investors, and institutions on corporate, regulatory, and transactional matters across Puerto Rico and U.S. jurisdictions.

Through this dual presence, Maceira Zayas provides counsel to clients operating in or entering the Puerto Rico market, aligning local requirements with U.S. regulatory and commercial standards. The firm regularly engages with federal and territorial agencies, legislative bodies, and public corporations on complex matters involving policy, compliance, and governance.

Dispute Resolution and Advocacy
The Firm represents clients before administrative agencies, trial and appellate courts, and arbitral forums. Its lawyers handle commercial, administrative, and high-stakes litigation, applying disciplined advocacy and practical judgment in every forum — whether in the boardroom, the courtroom, or before Congress.

Representative practice areas
• Corporate and commercial law
• Tax incentives and Act 60 compliance
• Infrastructure, energy, and public-private projects
• Finance and real-estate transactions
• Administrative and regulatory law
• Litigation, arbitration, and appellate advocacy
• Government and legislative affairs

Recognition & Affiliations
MZLS LLC is the exclusive IR Global member firm in Puerto Rico for Commercial, Corporate, Administrative, and Tax Law, connecting the firm to a network of more than 1,300 advisory firms in 165 jurisdictions.
The firm and its Managing Member, Anthony O. Maceira Zayas, have also been recognized by Leaders in Law, where Mr. Maceira was named Lawyer of the Year in Puerto Rico (Commercial Law).

For more information, visit www.mzls.com
 or contact info@mzls.com

MZLS LLC

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