Jonathan Rosenberg is a partner in O’Melveny’s New York office, a member of the Firm’s Policy Committee, and a member of the Securities Litigation Practice and White Collar Defense and Corporate Investigations Practice. He focuses on securities, M&A, and commercial litigation, internal investigations, and white collar criminal defense. Prior to joining the Firm, Jonathan was an Assistant U.S. Attorney in the Southern District of New York for six years, where he spent two-and-a-half years in the Securities and Commodities Frauds Unit and served as Deputy Chief of the Criminal Division. Jonathan has tried more than twenty cases in government and private practice. Jonathan has also argued many times before federal and state appellate courts, including the United States Court of Appeals for the Second Circuit and the Delaware Supreme Court.

Jonathan has been recognized by Chambers USA - America’s Leading Lawyers for Business (2009-2014); by American Lawyer Litigation Daily as “Litigator of the Week” (February 9, 2012); by Law360 as “Most Valuable Player in Securities Litigation” (2011); and as a New York “Super Lawyer” for Securities Litigation, Criminal Defense: White Collar, Business Litigation in annual surveys conducted by Law & Politics Media (2008-2014).