Sigal Mandelker joined Ribbit Capital in April 2020. Ribbit is an investment firm focused on financial services and technology. Prior to Ribbit, she served as Under Secretary of Treasury for Terrorism and Financial Intelligence and as Acting Deputy Secretary. As Under Secretary, Sigal supervised four main components of Treasury (OFAC, FinCEN, the Office of Intelligence and Analysis, and the Office of Terrorist Financing and Financial Crimes). Before serving at Treasury, Sigal was a partner at Proskauer in New York. Sigal also previously served in a number of senior positions in the U.S. government, including as Deputy Assistant Attorney General in the Criminal Division of the Justice Department, an AUSA in the U.S. Attorney’s Office for the Southern District of New York, Counselor to Secretary of Homeland Security Michael Chertoff, and Counsel to the Deputy Attorney General. Sigal is also an Advisor to Chainalysis, is on the Boards of the Crypto Council for Innovation and the Financial Technology Association, is Co-Chair of the Center for a New American Security’s (CNAS) task force on FinTech, Crypto, and National Security, is a Member of the US Holocaust Memorial Museum Council, and Chair of the US Holocaust Memorial Museum's Collections & Acquisitions Committee.