Lev L. Dassin is a partner based in the New York office of Cleary Gottlieb Steen & Hamilton LLP. Mr. Dassin’s practice focuses on complex commercial litigation, white-collar criminal defense, regulatory enforcement matters, and internal investigations.

Mr. Dassin has represented prominent corporations and individuals in criminal and regulatory investigations in the United States and internationally involving various forms of alleged corporate misconduct, including securities fraud, bank fraud, wire fraud, mail fraud, foreign bribery, insider trading, and antitrust offenses. He has also represented clients in private commercial disputes, including securities, derivative, intellectual property, mass tort, and antitrust litigation. Mr. Dassin has tried cases in federal and state court, and argued numerous appeals.

Before returning to private practice, Mr. Dassin served as Acting U.S. Attorney for the Southern District of New York. In that capacity, he oversaw a number of high profile matters, including the prosecutions of Bernard Madoff and Marc Dreier, and the representation of the United States’ interest in the Chrysler and General Motors bankruptcy proceedings. Mr. Dassin previously served as Deputy United States Attorney, the second in command of the office, and as Chief of the Criminal Division, in charge of all of the criminal prosecutions and investigations in the district.

Mr. Dassin joined the firm in 2009 as a partner. He received a J.D. from New York University School of Law in 1990, and an undergraduate degree, magna cum laude and with Distinction In All Subjects, from Cornell University in 1987.