When government is on the other side of the table.
We are a full-service law firm with offices in San Juan and Washington, D.C. — small by choice, built for complex matters. Our team includes a former Associate Justice of the Puerto Rico Supreme Court and attorneys who have served at the highest levels. When your problem touches government, you need attorneys who've been inside it. We didn't just study it — we built parts of it.
Deep experience advising public agencies and private enterprises on compliance, strategy, and complex transactions
Judiciary & Academy
Insight rooted in judicial clerkships and academic leadership, offering both practical and principled legal perspectives
Big law & International
Global expertise from top-tier law firms and cross-border engagements, ensuring world-class legal solutions
Business & Government
Deep experience advising public agencies and private enterprises on compliance, strategy, and complex transactions
Judiciary & Academy
Insight rooted in judicial clerkships and academic leadership, offering both practical and principled legal perspectives
Big law & International
Global expertise from top-tier law firms and cross-border engagements, ensuring world-class legal solutions
CORE PRACTICE AREAS
02
Appellate Practice
03
Infrastructure & P3
04
General Counsel Services
05
Supporting Practices
02
Administrative Law
03
Appellate Practice
04
Contracts
05
External General Counsel
Selected Matters
Infrastructure & Disaster Recovery
Representation of a New York public utility authority in emergency environmental proceedings before the U.S. Environmental Protection Agency (EPA), including negotiation of a no-action assurance for large-scale emergency generation deployment in Puerto Rico and concurrent coordination with the U.S. Army Corps of Engineers and the Federal Aviation Administration.
Public-Private Partnerships
Representation of a public authority in FAA approval proceedings for airport land-use conditions on a public-private partnership structured under Act 29-2009, including the release of federal land-use designations under 49 U.S.C. § 47107 and engagement with the U.S. Department of Transportation, the United States Congress, and the White House.
Energy Regulation
Representation of a major power producer before the Puerto Rico Energy Bureau (PREB) in regulatory proceedings to authorize fuel conversion for generation facilities, securing agency approval within three months of engagement.
Government Affairs
Government affairs representation of Amazon, Lyft, and Gothams before the Puerto Rico Legislature and federal agencies, including regulatory and legislative advocacy on matters affecting operations in Puerto Rico.
Appellate
Precedent-setting proceedings before the Puerto Rico Supreme Court establishing applicable standards in the entertainment industry; constitutional appeals before the U.S. Court of Appeals for the First Circuit involving equal protection and due process questions; and commercial transactions appellate matters resulting in full reinstatement of trial court judgments after Court of Appeals modification.
Regulatory & Market Entry
Representation of multiple Fortune 500 and Fortune 100 companies in multi-agency market entry proceedings in Puerto Rico, including coordination of regulatory approvals across the Department of Economic Development and Commerce (DDEC), the Department of Consumer Affairs (DACO), the Office of Permits Management (OGPe), and the Department of the Treasury, and registration in the Registro Único de Licitadores (RUL) and Registro Único de Proveedores (RUP).
success stories
PE Former Executive Director
COR3
MZLS provided swift and innovative legal solutions in complex cases, including FEMA arbitration and EPA negotiations for LNG-powered generators, ensuring compliance and risk mitigation.
Former General Counsel
Public Private Partnerships Authority
Anthony's extensive P3 experience was pivotal in managing contracts, drafting procurement guidelines, and securing FAA approval for airport land agreements, significantly aiding our P3 initiatives.
General Counsel
Leading Disaster Recovery Institution
MZLS's expertise in acquisition laws and regulatory compliance was crucial in navigating complex procurement processes, ensuring energy projects remained on schedule and within budget.
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Schedule a consultation or ask a question—our attorneys are ready to help.
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Schedule a consultation
Schedule a consultation or ask a question—our attorneys are ready to help.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
2026 Congressional Calendar
The 2026 Congressional Calendar was officially released! Access the combined House and Senate schedules now — downloadable files with full-year and monthly below.
