Sigal Mandelker recently joined Ribbit Capital as a General Partner. Ribbit is a family of
investment funds based in Silicon Valley and focused on the intersection of financial services
Prior to joining Ribbit, she served as Under Secretary of Treasury for Terrorism and Financial
Intelligence, holding one of the top roles at the U.S. Department of the Treasury. She was also
acting Deputy Secretary during much of her time at Treasury. As Under Secretary, she
supervised four main components of Treasury (OFAC, FinCEN, the Office of Intelligence and
Analysis, and the Office of Terrorist Financing and Financial Crimes), nearly 900 professionals,
and a $275+ million budget. She also served on the Deputies Committee of the National
Security Council and worked with senior government officials around the globe.
She is widely respected in the US and abroad — credited with transforming how the US uses
economic measures to disrupt the movement of bad money around the world and for changing
behavior of illicit actors. She has been a leader in promoting innovation in financial institutions
while positively reforming the US AML system, alongside the heads of the OCC, FDIC, NCUA,
FinCEN, and the Vice Chair of the Federal Reserve Board of Governors.
Before serving as Under Secretary of 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 of the Criminal Division of the Justice Department, an
AUSA in the the Southern District of New York, Counselor to Secretary of of Homeland Security
Michael Chertoff, Counsel to the Deputy Attorney General, and as a law clerk to both US
Supreme Court Justice Clarence Thomas and Judge Edith Jones of the Court of Appeals for
the Fifth Circuit. She has received numerous awards and recognition both for her public service
and her work in the private sector, including most recently the Alexander Hamilton Award for
Sigal is also an Advisor to Chainalysis, serves on the advisory group to the Digital Dollar
Project, and is Member of the US Holocaust Memorial Council.