Sigal Mandelker, the Treasury Department's under secretary for terrorism and financial intelligence, has been one of the Trump administration’s most hawkish members on Iran and has spearheaded the White House’s aggressive use of sanctions around the world. She plans to return to the private sector. She left the role of top sanctions official in October 2019 to return to the private sector. Ms. Mandelker served as Deputy Assistant Attorney General in the Criminal Division of the Department of Justice, where she oversaw four major sections, including Computer Crime and Intellectual Property, co-chaired a US-China law enforcement working group focused on developing multi-national intellectual property investigations and prosecutions and testified before Congress numerous times on matters of criminal law. Before that, she was Counselor to the Secretary of the Department of Homeland Security, advising on operational, legislative and regulatory matters concerning law enforcement, immigration, intelligence, national security and information sharing. Earlier in her career, Ms. Mandelker was a counsel to the US Deputy Attorney General and an Assistant United States Attorney in the Southern District of New York, where she prosecuted numerous cases involving healthcare fraud, money laundering, alien smuggling and document fraud, among many others. A graduate of the University of Michigan, she earned her law degree from the University of Pennsylvania Law School.