Lorin L. Reisner, chief of the criminal division of the U.S. Attorney's Office for the Southern District of New York, announced yesterday that he is leaving government service for the private sector next month. Reisner is expected to join a law firm, the NYT reports, but Reisner did not identify which firm he may be joining.

In his role as chief of the criminal division, Reisner has led the SDNY's numerous high-profile investigations into securities fraud matters, including a highly-successful string of insider trading prosecutions. Under Reisner, the SDNY's criminal division obtained convictions in insider trading cases against former Goldman Sachs board member Rajat Gupta, as well against Mathew Martoma of SAC Capital. Preet Bharara, the United States Attorney for the SDNY, announced that his current chief counsel, Joon Kim, will succeed Reisner and Daniel L. Stein, a partner at law firm Richards Kibbe & Orbe, will succeed Kim as chief counsel.

Prior to this most recent stint with the SDNY (Reisner previously served as an AUSA for the Southern District from 1990 to 1994), Reisner was the Deputy Director of the SEC's Division of Enforcement from 2009-2012. At the SEC, he worked with Enforcement Director Robert Khuzami to significantly restructure the Enforcement Division through actions including creating specialized enforcement units, establishing a new Office of Market Intelligence, establishing a cooperation program, and others. He also led the SEC's case against Goldman Sachs in 2010 that led to a $550 million settlement.

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