Kyle previously served under Senator Charles E. Grassley on the U.S. Senate Committee on the Judiciary, where he provided counsel on a range of civil and administrative law matters, including the Anti-Terrorism Act, Administrative Procedure Act, Freedom of Information Act (FOIA), Foreign Sovereign Immunities Act, and Foreign Agents Registration Act. During his tenure, he also assisted in the confirmations of multiple associate justices of the U.S. Supreme Court and supported Senator Grassley’s legislative efforts to deter—and secure victim compensation for—acts of international terrorism.