May 14, 2019: Edward O’Callaghan was appointed as the Acting Deputy Attorney General at the U.S. Department of Justice on Friday, May 10, 2019. O’Callaghan, Republican, succeeds Rod Rosenstein, who retired as the Deputy Attorney General on Saturday, May 11, 2019, after twenty-nine years at the Justice Department. O’Callaghan was previously the Acting Principal Associate Deputy Attorney General; the Principal Deputy Assistant Attorney General at the Justice Department’s National Security Division; and the Acting Assistant Attorney General at the National Security Division. Before he re-joining the Justice Department in 2017, O’Callaghan was a partner at the New York office of the law firm Clifford Chance from 2011 to 2017, and he worked at the law firm Nixon Peabody from 2009 to 2011. As a private lawyer, he specialized in defending financial institutions, public companies, asset management firms, and individuals in international and domestic regulatory investigations and criminal prosecutions. These cases involved securities fraud, bank fraud, money laundering, RICO, and corruption. O’Callaghan was also previously an Assistant U.S. Attorney for the Southern District of New York, from 1999 to 2008. He was also the Co-Chief of the Terrorism and National Security Unit from 2005 to 2008. As an Assistant U.S. Attorney, O’Callaghan was the lead prosecutor on several notable cases, including the Justice Department’s international fraud investigation and prosecutions in relation to corruption at the United Nations Oil-for-Food Program, RICO prosecutions of crime families, and numerous bank and securities fraud cases. O’Callaghan received his B.A. degree from Georgetown University, and he received his law degree from the New York University Law School in 1994.