
He personally tried 20 cases to verdict, argued 25 appeals in the United States Courts of Appeals for the Second Circuit, and also argued appeals in Third and Sixth Circuits. He served as Chief of the Criminal Division, Chief of Special Prosecutions, Chief of Organized Crime and Chief of Appeals. The Defender Services Committee is responsible for the approximately $1 billion per year program that provides effective defense counsel to the 80% of federal defendants who cannot afford to retain counsel.īefore his appointment to the bench in 1994, Judge Gleeson was a federal prosecutor in the same courthouse for 10 years. Judge Gleeson served on the Judicial Conference Committee on Defender Services for nine years (including three years as Chair).


He was assigned numerous Multidistrict Litigations, including two antitrust class actions against Visa and MasterCard and the Air Cargo antitrust cases. He also presided over more than 200 civil and criminal jury trials. While a judge, Judge Gleeson authored more than 1,500 published opinions (including 14 opinions for the United States Court of Appeals for the Second Circuit, sitting by designation). Prior to joining the firm, Judge Gleeson was a United States District Judge in the Eastern District of New York, sitting in Brooklyn.
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Judge Gleeson is ranked as a leading lawyer in White Collar-Crime and Government Investigations by Chambers USA (2022), where clients have described him as “a thought leader” and “a skillful trial lawyer with great judgment.” He is also recommended by The Legal 500 US (2021) for International Litigation. Judge Gleeson has also been appointed as amicus curiae on three occasions in separate federal courts to argue important issues of federal criminal law and procedure, including to make the argument against the government’s motion to dismiss the prosecution of former National Security Advisor Michael Flynn.

Since joining Debevoise, Judge Gleeson has argued cases in numerous federal and state courts of appeals, conducted trial proceedings in federal and state courts, appeared in multiple bankruptcy proceedings, acted as both a mediator and arbitrator in commercial and employment disputes, conducted independent investigations, advised boards of directors on corporate governance matters, and provided expert testimony on United States law in multiple foreign tribunals. Judge Gleeson is a Commissioner on the United States Sentencing Commission.Ī fellow of the American College of Trial Lawyers, Judge Gleeson’s practice focuses on white collar defense, complex civil litigation, internal investigations, and dispute resolution. He is a litigation partner in the White Collar & Regulatory Defense and Commercial Litigation Groups. Judge John Gleeson is a trial and appellate lawyer and company advisor who was a federal judge for 22 years before joining the firm in 2016.
