Integrated approach. Comprehensive support. Focused on your success.
Your trusted business partner in Puerto Rico.
As a leading full-service law firm in Puerto Rico, O’Neill & Borges provides the comprehensive legal support businesses need to succeed on the Island. With more than 60 years of experience, companies rely on our team to navigate Puerto Rico’s complex legal and regulatory landscape with clarity, precision, and strategic insight. Based in San Juan, our multidisciplinary attorneys deliver trusted guidance across corporate, transactional, regulatory, and litigation matters, helping businesses advance, adapt, and achieve their goals with confidence.
Featured Attorney
Antonio L. Collazo-Bennazar
Antonio L. Collazo-Bennazar is a valued member of the firm’s Corporate Department, where he delivers sophisticated and strategic legal counsel to a broad spectrum of industrial and commercial clients. His practice encompasses representation of pharmaceutical companies, financial institutions, renewable energy developers, oil and gas enterprises, manufacturers, and waste management organizations, among others.With nearly two decades of experience, Mr. Collazo-Bennazar concentrates his practice in zoning and land use, environmental law, energy law, and administrative law. He has developed a strong track record of successfully guiding clients through complex regulatory frameworks and representing them before a wide array of local and federal agencies. His experience includes appearances and advocacy before the Puerto Rico Department of Natural and Environmental Resources (DNER), the Puerto Rico Energy Bureau (PREB), the U.S. Environmental Protection Agency (EPA), and the U.S. Army Corps of Engineers, as well as other governmental entities.Mr. Collazo-Bennazar is particularly well regarded for his work in the energy sector, where he advises key stakeholders—including project developers, EPC contractors, investors, lenders, and offtakers—on both renewable and conventional energy projects. His experience spans distributed generation initiatives as well as large-scale, utility-grade developments, enabling him to provide comprehensive, business-oriented guidance across the full lifecycle of energy projects.Since 2021, he has been consistently recognized as a Band 2 attorney in Environmental Law by Chambers and Partners – Latin America, reflecting his professional excellence, industry knowledge, and commitment to client service.











