About Joseph
Joseph M. Callahan is a distinguished tax attorney based in New York City, specializing in complex tax matters. He serves as the Managing Attorney at Mackay, Caswell & Callahan, P.C., a reputable law firm established in 1961. This firm, located at 10 East 39th Street, Suite 901, New York, NY 10016, focuses primarily on IRS and New York State tax controversies. Under Mr. Callahan's leadership, the firm has developed a strong reputation for effectively navigating intricate tax disputes and providing clients with strategic guidance. Mr.
Callahan earned his Bachelor of Science in Public Relations from Syracuse University in 1981. Recognizing the importance of a solid educational foundation, he pursued a joint Master of Science in Accounting and Juris Doctor degree at Syracuse University College of Law, graduating in 1986. During his time in law school, he demonstrated exceptional leadership skills as an active member of the Moot Court Board, where he served as Chair from 1984 to 1985. His dedication to excellence was further acknowledged when he received the prestigious Order of the Barristers, a recognition awarded to outstanding advocates. Before entering private practice, Mr. Callahan worked as a State & Local Tax Consultant for Deloitte in Manhattan. This role provided him with a robust foundation in tax law, which he has built upon over his impressive 35-year career.
His extensive knowledge of tax regulations and compliance has proven invaluable in representing clients at Mackay, Caswell & Callahan, P.C. He handles many tax-related matters, including audits, collection actions, and complex tax disputes. His expertise extends to both federal and New York State tax issues, as well as multi-state tax matters, making him a versatile asset for his clients. Since his admission to the New York State Bar in 1987, Mr. Callahan has been an active member of the New York State Bar Association. He is also admitted to practice in Connecticut, adding to his ability to serve clients across state lines. His commitment to professional development is evident in his involvement in various legal organizations and continuing education programs.
In addition to his legal practice, Mr. Callahan has made significant contributions to the academic community. He has taught law and lectured on various legal matters at Syracuse University, as well as in numerous continuing legal education programs. His dual background in accounting and law enables him to provide comprehensive solutions to complex tax issues, ensuring that his clients receive well-rounded and informed representation. With a career dedicated to excellence in tax law, Mr. Callahan continues to be a leading figure in the field.
