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Jonathan S. Sack has extensive experience litigating complex civil and criminal cases. He represents individuals and companies in federal and state criminal, civil, and regulatory matters, and conducts internal investigations.
He served for thirteen years as an Assistant U.S. Attorney for the Eastern District of New York, where he handled significant prosecutions in the areas of securities and financial institution fraud, RICO violations, export control offenses, money laundering, and drug trafficking. While Chief of the Criminal Division there, he oversaw investigations and prosecutions conducted by more than one hundred Criminal Division Assistant U.S. Attorneys in all areas of federal criminal law. He tried more than a dozen federal cases and has argued on numerous occasions in the Court of Appeals for the Second Circuit. In 1996, he received a Department of Justice Director’s Award for Superior Performance as an Assistant U.S. Attorney. Prior to becoming an Assistant U.S. Attorney, Jon was an associate at Cravath, Swaine & Moore. He joined Morvillo Abramowitz as a partner in 2003.
Jon is co-author of Federal Corporate Sentencing: Compliance and Mitigation, Rev. Ed. (2017), a frequently cited one-volume treatise updated annually, and co-author of the “White Collar Crime” column in the New York Law Journal. Jon is a regular contributor to The Insider Blog on Forbes.com. He has been an Adjunct Professor of Law at St. John’s University School of Law, where he has taught a course in white collar crime, and regularly publishes articles and speaks on issues relating to the representation of companies and individuals in criminal, regulatory and internal investigations.
Named a leading lawyer by Chambers USA: America's Leading Lawyers for Business in the area of Litigation: White Collar Crime & Government Investigations, Jon has been described as “one of the most diligent and careful lawyers ... he's a lawyer's lawyer.” He also has been recommended by The Legal 500 United States in White Collar Criminal Defense and Securities Litigation and described as “relentless and infallible.” Benchmark Litigation: The Definitive Guide to America’s Leading Litigation Firms & Attorneys has recognized Jon as a “Litigation Star” in the area of White Collar Crime/Enforcement/Investigations. In addition, Who’s Who Legal – The International Who’s Who of Business Lawyers has recognized Jon as a leading business crime defense lawyer and described him as “technically brilliant and extremely reliable.” He has also been recognized in Thomson Reuters’ Super Lawyers.
Jon is a member of the Advisory Committee on Civil Litigation of the United States District Court for the Eastern District of New York. He belongs to numerous professional organizations, including the American Bar Association, the New York City Bar Association (past member of the Federal Courts and Criminal Law Committees), the Federal Bar Council (Chairman of the U.S. Attorneys Internship Committee, and member of the Second Circuit Courts Committee), and the National Association of Criminal Defense Lawyers. Jon is on the Executive Committee of the Yale Law School Association and is a member of the Editorial Advisory Board of Today's General Counsel magazine. He is also a member of the Advisory Board of Common Justice, a project based in Brooklyn, New York, which works with victims of crime, defendants, and courts to provide an alternative to incarceration for youthful offenders.