Veteran federal prosecutor Marc Berger is moving into the private sector, joining Ropes & Gray’s government enforcement practice in New York as a partner in July.

Berger, 39, chief of the Southern District U.S. Attorney’s Office’s Securities and Commodities Task Force, has played a major role in an unprecedented crackdown on insider trading, supervising a number of high-profile cases including the recent charges against four SAC Capital Management Companies and the trial of Galleon Group hedge fund founder Raj Rajaratnam.

A graduate of Cornell University and University of Virginia Law School, Berger served as law clerk for Southern District Judge Richard Berman. He joined the U.S. Attorney’s Office in 2002 worked in the international narcotics unit and then moved into securities enforcement, becoming the deputy chief of the Securities Fraud Unit in 2010 and then chief of the task force in 2012. During his 12 years at the office, he won convictions in 13 jury trials and argued 21 cases before the U.S. Court of Appeals for the Second Circuit.