María E. Picó

Mr. Muñiz represents clients in all phases of tax controversy and litigation matters, from tax audits and examinations through administrative appeals and court proceedings. He actively participates in multiple tax litigations representing clients on wide arrays of tax challenges, including: municipal license tax, income tax, personal property tax and construction excise tax deficiency procedures. He also has extensive experience representing taxpayers during the real property tax asses...

Ms. Amarily Maldonado, Esq. joined Casillas, Santiago & Torres, LLC in April 2018, where she serves as an Attorney in the Corporate and Tax Divisions. Prior to joining the firm, Ms. Maldonado was a Senior Manager in the Tax Advisory Division of a major international accounting firm in Puerto Rico, where she tenured for six years. Ms. Maldonado commenced her career as an Associate in the Corporate Tax practice of one of the Big Four accounting firms and also served as a corporate and tax a...

Luis Raúl Román Negrón is a lawyer recognized by Best Lawyers in the practice areas of Appellate Practice and Litigation. Luis Raúl practices law in San Juan, Puerto Rico Best Lawyers has recognized Luis Raúl Román Negrón since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Luis Raúl Román Negrón is held by other lawyers.

Rodney W. Colón-Ortiz is a lawyer recognized by Best Lawyers in the practice areas of Corporate and M&A Law and Land Use and Zoning Law. Rodney W. practices law in San Juan, Puerto Rico Best Lawyers has recognized Rodney W. Colón-Ortiz since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Rodney W. Colón-Ortiz is held by other lawyers.

Marta S. Ramírez-Isern is a lawyer recognized by Best Lawyers in the practice areas of Corporate and M&A Law and Real Estate Law. Marta S. practices law in San Juan, Puerto Rico Best Lawyers has recognized Marta S. Ramírez-Isern since 2020. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Marta S. Ramírez-Isern is held by other lawyers.

Ms. Vélez' practice is focused on advising clients on the tax treatment of corporate transactions and reorganizations, as well as assistance in devising tax-efficient corporate structures for new or existing Puerto Rico operations. She has worked extensively with the Puerto Rico tax and industrial incentives acts and provisions relative to U.S. income taxation of international operations, as well as the Puerto Rico and U.S. taxation of investment income, including government obligation...

María Echenique-Arana is a lawyer recognized by Best Lawyers in the practice area of Labor and Employment Law. María practices law in San Juan, Puerto Rico Best Lawyers has recognized María Echenique-Arana since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which María Echenique-Arana is held by other lawyers.

Claudia Motta is a lawyer recognized by Best Lawyers in the practice areas of Banking and Finance Law, Corporate and M&A Law and Corporate Governance & Compliance Practice. Claudia practices law in San Juan, Puerto Rico Best Lawyers has recognized Claudia Motta since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Claudia Motta is held by other lawyers.

Ms. Diez is an experienced trial attorney with over 15 years of practice with a successful litigation record representing employers. She provides legal counseling in all areas of employment law. She actively litigates employment lawsuits and administrative matters, both in local and federal forums, with excellent results for clients. Her practice focuses on preventive counseling and litigation in diverse topics, including wrongful termination, employment discrimination, wage and hour, retalia...

Mr. Juan J. Casillas-Ayala, Esq. is an Attorney at Casillas, Santiago & Torres, LLC, where he specializes in Labor & Employment and Commercial Litigation. He was a shareholder in the Labor and Employment division of a major law firm in Puerto Rico, where he further sharpened his litigation skills during his 11 years tenure at the firm. Prior to this, he served as law clerk at the Court of Appeals with now Supreme Court Justice Rafael Martínez-Torres and subsequently at the Supreme Co...