Having worked in the administrations of the last two governors of New Jersey and for a New Jersey federal judge, Guillermo brings a deep understanding of the political and legal landscape of the state to his work with clients. Focusing his practice on government affairs and complex business litigation, he advocates for individual clients and trade associations across multiple industries, including, telecommunications, technology, healthcare, pharmaceutical, alcohol, automotive, construction, long-term care, education, energy, advertising, and fintech. Guillermo chairs McCarter’s Government Affairs practice, and leads the firm’s Cannabis Group.
A registered Government Affairs Agent in New Jersey, Guillermo helps clients achieve their governmental, media, and business development objectives. He is widely recognized as a political leader in the state, with ROI-NJ noting “He’s a force in Trenton and around the state, as he has mastered the ability to match top-notch legal knowledge with political intuitiveness and polish.” Guillermo is active in state and national politics, and served as co-chair of President Joe Biden’s 2020 presidential campaign in New Jersey.
As Associate Counsel to Governor Philip D. Murphy, Guillermo handled legislative initiatives, overseeing a portfolio of departments and agencies that included Treasury, Banking & Insurance, Transportation, Economic Development, Environmental Protection, Motor Vehicle, and the Board of Public Utilities. He was also responsible for appointments in Counsel’s Office and oversaw the Governor’s vetting process for judicial and prosecutorial candidates across the State.
Previously, Guillermo served as Corporate Counsel at Greenskies Renewable Energy, the largest commercial and industrial solar energy developer in the United States.
After law school, Guillermo served as a law clerk to the Honorable Esther Salas, United States District Judge, District of New Jersey. He draws on this experience to provide local counsel expertise to clients involved in Hatch-Waxman and other complex litigation in the United States District Court of New Jersey.
During law school, Guillermo worked in the Intergovernmental Affairs Group of Governor Chris Christie, as the Governor’s Executive Fellow from Rutgers University’s Eagleton Institute of Politics.
In the community, Guillermo serves on the boards of the New Jersey Performing Arts Center, First Tee of Metropolitan New York, and the Statewide Hispanic Chamber of Commerce. He is also active in the Hispanic Bar Association of New Jersey, the Hispanic National Bar Association, the New Jersey Legal & Education Empowerment Project, the Cuban American Alliance for Leadership & Education, Waterfront Project, Cuba Study Group, and Full Court Peace.
