About

John Hannon is an attorney with Sullivan & Marshall in New York, New York, where he represents clients in a broad range of legal matters as part of the firm’s general practice. Based in New York, NY, Mr. Hannon brings a practical, client-focused approach to his work, guiding individuals and businesses through legal issues with professionalism, responsiveness, and attention to detail. His practice is centered on helping clients understand their options and move forward with confidence in matters that require careful judgment and clear communication. In his role at Sullivan & Marshall, Mr. Hannon is committed to providing thoughtful legal support tailored to each client’s needs. He recognizes that no two matters are alike, and he works to deliver solutions that are both strategic and efficient. Whether addressing day-to-day legal concerns or more complex issues, Mr. Hannon strives to provide dependable counsel grounded in a strong understanding of the law and a dedication to client service. Licensed in New York and admitted under Bar Number 2621068, John Hannon serves clients from the firm’s New York office with a focus on integrity, diligence, and practical problem-solving. His approach reflects the values clients seek in a general practice attorney: clear guidance, steady communication, and a commitment to protecting client interests at every stage.

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