Recognized in Best Lawyers since 2024 
Mr. Luis F. Llach-Zúñiga, Esq. is a Capital Member at Casillas, Santiago & Torres, LLC, with more than 20 years of experience counseling and representing multinational and local companies in a broad spectrum of high-stakes employment and commercial matters. His practice spans complex commercial and employment litigation, sophisticated transactional work, and the negotiation and structuring of multi-million-dollar concession agreements, in addition to tort, personal injury, and premises liability claims before the U.S. District Court for the District of Puerto Rico and local courts.
Mr. Llach-Zúñiga has extensive experience advising management on employment and labor matters, including compliance with federal and local employment laws, human resources compliance, and policy development across the full employment life cycle. He regularly counsels clients on employee terminations, reductions in force, reorganizations, and leave and accommodation issues under applicable federal and local statutes. He also represents employers in complex discrimination, retaliation, and sexual harassment litigation, as well as in non-compete and solicitation disputes before the U.S. District Court for the District of Puerto Rico and Puerto Rico courts. In addition, he has substantial experience handling administrative proceedings and arbitration before the Equal Employment Opportunity Commission (EEOC) and the Puerto Rico Department of Labor and Human Resources (PR-DOL).
Beyond litigation, Mr. Llach-Zúñiga brings significant experience in complex commercial matters and transactional representation, advising clients in corporate structuring, contractual negotiations, acquisitions, and the documentation of sophisticated business arrangements. As a true business partner to his clients, he has played a key role in negotiating and drafting multi-million-dollar concession agreements and related commercial contracts, helping clients successfully navigate regulatory, operational, and risk-allocation considerations in high-value deals.
His practice further includes advising and representing multinational and local companies in complex contractual disputes, as well as tort, personal injury, and premises liability matters in both federal and local courts.
