Vicente J. Antonetti

Mr. Juan C. Nieves-González, Esq. is an attorney at Casillas, Santiago & Torres, LLC, where he serves in the Litigation, Insurance and Labor & Employment groups. Prior to joining CST, he worked for over six (6) years at another firm focusing on civil rights and labor and employment matters. He has experience in conducting direct and cross examinations of witnesses in court, including in civil jury trials before the United States District Court for the District of Puerto Rico. H...

Juan A. Frau Escudero is a lawyer recognized by Best Lawyers in the practice area of Litigation. Juan A. practices law in San Juan, Puerto Rico Best Lawyers has recognized Juan A. Frau Escudero 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 Juan A. Frau Escudero is held by other lawyers.

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...

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. 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...

Mariola’s practice focuses on federal litigation and appellate matters involving regulatory enforcement , administrative law, and compliance disputes. Based in San Juan, she advises public and private clients on federal oversight, healthcare, energy , and economic-development matters, including issues arising at the intersection of local and federal regulatory frameworks. Her work includes developing litigation strategy, drafting dispositive and appellate briefs, managing discovery, and...

Caridad Muñiz-Padilla is a lawyer recognized by Best Lawyers in the practice area of Tax Law. Caridad practices law in San Juan, Puerto Rico Best Lawyers has recognized Caridad Muñiz-Padilla 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 Caridad Muñiz-Padilla is held by other lawyers.

Eidalia González-Tosado is a lawyer recognized by Best Lawyers in the practice area of Energy Law. Eidalia practices law in San Juan, Puerto Rico Best Lawyers has recognized Eidalia González-Tosado since 2025. 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 Eidalia González-Tosado is held by other lawyers.

Alfredo Alvarez-Ibáñez is a member in the Corporate Department. He has been with O’Neill & Borges since 1996. Alfredo’s practice is concentrated in various areas of commercial law and creditors’ rights, including real estate, commercial lending, secured transactions, asset-based finance, and complex out-of-court workouts and restructurings, representing both local and U.S.-based financial institutions and businesses. Alfredo’s practice also involves c...

Her main areas of practice are corporate and individual income taxes. Prior to joining McConnell Valdés, she was a Tax Counsel with the Puerto Rico Treasury Department, where she reviewed private letter rulings concerning a broad range of issues including corporate and flow-through entities taxation, tax reorganizations, sales and use tax and other tax matters.