Rob served most recently as the Presidentially-appointed Senate confirmed (PAS) Inspector General for the U.S. Department of Defense (DoD), leading a team of more than 1,850 oversight professionals in more than 50 offices worldwide in conducting robust programmatic and investigative oversight of DoD programs and personnel. He served as the Congressionally-designated Special Inspector General for Operation Atlantic Resolve, including U.S. assistance to Ukraine, and as Lead Inspector General for overseas contingency operations related to countering ISIS in Iraq and Syria and furthering U.S. policy goals in Afghanistan. He has been active in the leadership of the DoD and federal oversight communities, including chairing both the Defense Council on Integrity and Efficiency and the Technology Committee of the government-wide Council of the Inspectors General on Integrity and Efficiency (CIGIE), and he served on the CIGIE Executive Council, which sets direction and policy for the federal IG community.

Rob previously served as the first PAS Inspector General for the National Security Agency (NSA), the Deputy Inspector General and Whistleblower Ombudsperson for the U.S. Department of Justice, and for some two dozen years as a federal prosecutor at two U.S. Attorney’s Offices and, between them, the Public Integrity Section of the Criminal Division at DOJ. He has worked on many international programs on behalf of the U.S. government, and served as a Resident Legal Advisor for DOJ in Ukraine, assisting in the development of measures to address official corruption there. Rob returned to Kyiv to provide technical assistance on behalf of the US in the drafting of their anti-corruption legislation, and thereafter on multiple occasions to assist with its implementation. Rob also worked as a litigation associate at the law firms of Covington and Burling in Washington, D.C, and, later, Bond, Schoeneck & King in Albany, NY, and as a law clerk for the Hon. William D. Keller, U.S. District Judge for the Central District of California. Rob also also will teach as a Lecturer in Law at Columbia Law School in the spring term of 2026. He obtained his B.A., magna cum laude, from Harvard College, and graduated as a Harlan Fiske Stone Scholar from Columbia Law School.