Jonathan S Sack

Jonathan S Sack
565 Fifth Avenue
New York
New York
+1 212 880 9410
+1 212 856 9494


Who's Who Legal Business Crime Defence: Individuals

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 13 years as an assistant US 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 offences, money laundering and drug trafficking. While chief of the criminal division there, he oversaw investigations and prosecutions conducted by more than 100 criminal division assistant US 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 US attorney. Prior to becoming an assistant US 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 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 and 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 defence and securities litigation, in which he is described as “relentless and infallible”. Benchmark Litigation: The Definitive Guide to America’s Leading Litigation Firms & Attorneys has recognised Jon as a “Litigation Star” in the area of white-collar crime/enforcement/investigations. In addition, Who’s Who Legal has recognised Jon as a leading business crime defence lawyer and described him as “technically brilliant and extremely reliable”. He has also been recognised in Thomson Reuters’ Super Lawyers.

Jon is a member of the advisory committee on civil litigation of the US district court for the Eastern District of New York. He belongs to numerous professional organisations, 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 US 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.

Jon was educated at Yale Law School (JD) and Harvard University (AB, summa cum laude, Phi Beta Kappa).

WWL says: Jonathan Sack is a well-regarded litigator who impresses with his extensive experience handling complex regulatory matters.

This biography is an extract from Who's Who Legal: Business Crime Defence which can be purchased from our Shop.

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87 Lancaster Road, London
W11 1QQ, UK