Irish Legal 100


JOHN J. Halloran, Jr. is the founding partner of his firm, John J. Halloran, Jr., P.C., in White Plains, New York. His practice focuses on complex civil litigation, alternative dispute resolution and professional responsibility. During his tenure with the U.S. Department of Justice in Washington, D.C., Halloran represented the U.S. and Cabinet officers in landmark litigation throughout the nation, including cases involving bank fraud, money laundering and constitutional law.

In private practice in New York, he has represented individuals, multinational corporations and foreign states and governmental entities, including the Republic of Ireland and the European Union.

Halloran has served as counsel of record in the nation’s leading appellate courts, including the United States Supreme Court, U.S. Court of Appeals for the Second Circuit, New York State Court of Appeals, and the Appellate Division of the Supreme Court of the State of New York (First and Second Departments).

He has also been engaged in public service in three branches of New York State government. He serves as a special referee for the Grievance Committee (Ninth and Tenth Judicial Districts), and a special master for the Mandatory Civil Appeals Mediation Program of the Second Judicial Department.

A lifelong New Yorker, Halloran began his litigation career with Willkie Farr & Gallagher where he developed an expertise in complex civil litigation and international disputes.

Halloran is the recipient of many commendations and awards for professional excellence including, on three occasions, the U.S. Attorney General’s Special Achievement Award for Sustained Superior Performance of Duty.

Halloran earned a BA from State University of New York at Albany, and a JD from Albany Law School, Union University.

Halloran and his wife Suzanne reside in the Hudson Valley in New York and have three adult children: John, Tyler and Ashley.

Halloran’s paternal grandfather Thomas was from Co. Kerry. His grandmother Mary Cummings was from Co. Mayo. His maternal great grandparents Patrick and Margaret Shannon were also from Ireland.





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