Prior to working as the Principal Deputy Director of National Intelligence, she served as the Associate Deputy Director of the Central Intelligence Agency. Prior to that role, she held several management positions in the Agency’s Directorate of Science and Technology, working to develop and deploy innovative technology in support of intelligence collection and analysis.

O’Sullivan currently serves on the boards of directors of Centrus Energy Corp., Battelle Memorial Institute, HRL Laboratories (formerly Hughes Research Laboratories), and Accenture Federal Services (proxy board) and on the board of trustees of IQT (In-Q-Tel). Ms. O’Sullivan has been an adjunct faculty member at Georgetown University’s Center for Security and Emerging Technology and continues to support study activities for the Department of Defense, Office of the Director of National Intelligence, and the CIA. She was elected a member of the National Academy of Engineering in 2019.

O’Sullivan received a bachelor of science in civil engineering from Missouri Science and Technology University.