Began tenure in the National Security Division, of the U.S. Department of Justice, as an Attorney Advisor in the Office of Intelligence. Advocated on behalf of the U.S. government before the Foreign Intelligence Surveillance Court, securing authorization to conduct national security surveillance and searches. Conducted and led reviews of the Intelligence Community’s compliance with its obligations under the Foreign Intelligence Surveillance Act (FISA) and Executive Branch policies and procedures. Assisted prosecutors in obtaining authorization to use FISA information in criminal proceedings. (2008-2013)
Later became a Trial Attorney in the Counterterrorism Section. Investigated and prosecuted numerous terrorist cases, including the Boston Marathon bombing attack. Successfully disrupted multiple plots emanating from an overseas terrorist group. Brought the first successful prosecution, in the United States, of a computer hacker who hacked a U.S. company and provided personally identifiable information of U.S. government employees to a notorious overseas terrorist recruiter who sought to target the victims due to their service to the government. (2013-2018)
Finally, served as Counsel to the Assistant Attorney General for National Security, the presidentially appointed, Senate-confirmed head of the National Security Division. Assisted in formulating an initiative, established by the Attorney General, to prevent the transfer of the nation’s most advanced technologies to the Chinese Communist Party, whether through cyber and physical theft, facially lawful investments and acquisitions into U.S. businesses, or through “knowledge transfer” opportunities. Worked closely with the Division’s Foreign Investment Review Section to implement the Foreign Investment Risk Review Modernization Act (FIRMMA) of 2018, and to provide recommendations to the Deputy Attorney General and the Assistant Attorney General on hundreds of transactions pending before the Committee on Foreign Investment in the United States (CFIUS), as well as Team Telecom (telecommunications-related transactions). Detailed to U.S. Cyber Command, serving as the Department of Justice’s first official liaison to coordinate whole-of-government responses to malicious nation-state cyber activities. (2018-2021)