About

John Brennan is an attorney with Byrne, Costello & Pickard, P.C. in Syracuse, New York, where he practices general law with a client-focused, practical approach. Serving individuals and businesses throughout the Syracuse area and beyond, Mr. Brennan brings professionalism, responsiveness, and attention to detail to every matter he handles. His work is guided by a commitment to helping clients navigate legal issues with clarity and confidence, while providing straightforward guidance tailored to each client’s unique goals and concerns. As a general practice attorney, Mr. Brennan is equipped to assist with a broad range of legal needs, making him a valuable resource for clients seeking trusted counsel in a variety of matters. He understands that legal challenges often involve important personal, financial, or business decisions, and he works to deliver solutions that are both effective and efficient. Clients benefit from his thoughtful approach, strong work ethic, and dedication to maintaining clear communication throughout the legal process. Based in Syracuse, NY 13202, John Brennan is admitted to practice in New York under Bar Number 2095420. At Byrne, Costello & Pickard, P.C., he continues to build his practice on a foundation of integrity, diligence, and service. Whether addressing routine legal concerns or more complex issues, Mr. Brennan is committed to helping clients move forward with trusted legal support.

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