John R. O’Connor

Ms. López del Valle is an Income Member in the Litigation Practice Group. Her primary practice areas include general civil litigation and arbitration, with an emphasis on Securities Arbitration and Intellectual Property. https://www.mcvpr.com/attorneys-Sonia-Lopez

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.

Carolina Velaz Rivero is a lawyer recognized by Best Lawyers in the practice area of Insolvency and Reorganization Law. Carolina practices law in San Juan, Puerto Rico Best Lawyers has recognized Carolina Velaz Rivero 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 Carolina Velaz Rivero is held by other lawyers.

Karina Rodríguez is an associate in the San Juan, Puerto Rico, office of Jackson Lewis P.C. Her practice focuses on representing employers in workplace law matters, including preventive advice and counseling. She has successfully represented clients securing favorable outcomes at trials and appeals, as well as administrative agencies, such as the EEOC and the Department of Labor. She also provides preventive counseling to employers on topics such as internal corporate investigations on...

Mr. García-Díaz has over 20 years of experience in the private practice, providing counseling to clients in regulatory and compliance matters related to major federal and local environmental laws, such as CERCLA (Superfund), RCRA, Clean Air Act, Clean Water Act and the Oil Pollution Act. He represents clients before local and federal agencies with jurisdiction over Puerto Rico environmental matters, such as the United States Environmental Protection Agency, the United States Arm...

Odemaris Chacón Varona is a lawyer recognized by Best Lawyers in the practice areas of Health Care Law, Insurance Law, Labor and Employment Law, Medical Malpractice Litigation and Professional Malpractice Litigation. Odemaris practices law in San Juan, Puerto Rico Best Lawyers has recognized Odemaris Chacón Varona since 2018. 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...

Mr. Cook is known for his practical problem solving approach to complex real estate and financing matters. Throughout his career he has worked on a number of transactions requiring novel solutions, many of which have become industry standards. Over the years he has been involved in all aspects of real estate including: resort development, structuring of acquisitions, the permitting process at the federal and local level, structuring real estate joint ventures, planning timeshare, condominium,...

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.

José A. Meléndez Alfonzo is a lawyer recognized by Best Lawyers in the practice areas of Corporate and M&A Law and Energy Law. José A. practices law in San Juan, Puerto Rico Best Lawyers has recognized José A. Meléndez Alfonzo 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 José A. Meléndez Alfonzo is held by other lawyers.

María Judith (Nani) Marchand-Sánchez is a Capital Member and one of the founders of Ferraiuoli LLC and has vast experience in employment matters. She has successfully litigated before the Courts of First Instance of Puerto Rico and in the Federal Court, as well as government agencies and administrative forums, including participation in mediation and arbitration proceedings. Ms. Marchand has solid experience litigating disputes in areas such as discrimination, harassment, retali...