Jonathan D. Guynn was appointed Principal Deputy Assistant Attorney General on November 9, 2026, and currently serves as Acting Assistant Attorney General for the Civil Division. Mr. Guynn previously served as Deputy Assistant Attorney General for the Torts Branch from April 2025 to November 2026.
Prior to joining the Department, Jonathan was a partner at Jones Day in Dallas, Texas, where he represented clients throughout the United States in commercial litigation, securities litigation, trade secrets litigation, white-collar defense, and regulatory matters in a range of industries, including aerospace, energy, healthcare, ESG, cryptocurrencies, mining, real estate, transportation, and financial services. Jonathan also represented many clients in pro bono matters, including especially claimants seeking to vindicate their First Amendment rights.
Jonathan is a graduate of the University of Virginia School of Law and Brigham Young University. He served as a law clerk to the Honorable Kent A. Jordan on the U.S. Court of Appeals for the Third Circuit and the Honorable David G. Campbell on the U.S. District Court for the District of Arizona.
Source: www.justice.gov
