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As always, the Federalist Society takes no position on particular legal or public policy issues; all expressions of opinion are those of the speaker.
Judge, United States Court of Appeals, District of Columbia Circuit
Judge Katsas was appointed to the D.C. Circuit in December 2017. He graduated from Princeton University and Harvard Law School, where he was an executive editor on the Harvard Law Review. Between 1989 and 1992, he served as a law clerk to Judge Edward Becker on the Third Circuit, to then-Judge Clarence Thomas on the D.C. Circuit, and to Justice Thomas on the Supreme Court. Between 1992 and 2001, he was an associate and then partner in the Washington office of Jones Day, where he specialized in appellate and complex civil litigation. Between 2001 and 2009, he served in many senior positions in the Department of Justice, including as Assistant Attorney General for the Civil Division and as Acting Associate Attorney General. In 2009, he returned to Jones Day. From January to December 2017, he served as Deputy Assistant to the President and Deputy Counsel to the President.
Before joining the bench, Judge Katsas argued more than 75 appeals, including three cases in the Supreme Court, 13 cases in the D.C. Circuit, and cases in every other federal court of appeals. By appointment of the Chief Justice, he served on the Advisory Committee on Appellate Rules from 2013 to 2017. In 2016, he was elected to membership in the American Academy of Appellate Lawyers.
United States District Judge, United States District Court for the Middle District of Florida
In November 2020, the Senate confirmed Kathryn Kimball Mizelle as a United States District Judge for the Middle District of Florida. At age 33, she became the youngest Article III judge in the country. Prior to her confirmation, Judge Mizelle was in private practice at Jones Day, where she focused on complex civil and criminal litigation and appeals. Judge Mizelle previously served at the United States Department of Justice in the Office of the Associate Attorney General, in the Southern Criminal Enforcement Section of the Tax Division, and in the United States Attorney’s Office for the Eastern District of Virginia. Judge Mizelle has also taught as an adjunct professor of law at the University of Florida Levin College of Law and at George Mason University’s Antonin Scalia Law School.
Judge Mizelle earned her B.A., summa cum laude, from Covenant College, and her J.D., summa cum laude, from the University of Florida Levin College of Law. After graduation, Judge Mizelle served as a law clerk at every level of the federal judiciary: at the Supreme Court for Justice Clarence Thomas, at the D.C. Circuit for Judge Gregory G. Katsas, at the Eleventh Circuit for Chief Judge William H. Pryor Jr., and at the Middle District of Florida for Judge James S. Moody Jr.
William K. Townsend Professor of Law, Yale Law School
Nicholas R. Parrillo is Townsend Professor of Law at Yale, with a secondary appointment as Professor of History. His research and teaching focus on administrative law and government bureaucracy and extend to legal history, remedies, and legislation. He has received the ABA’s award for the year’s best scholarship in administrative law and the Law and Society Association’s Hurst Prize for the year’s best book in legal history.
Parrillo’s Yale Law Journal article finding new originalist evidence of broad congressional delegations to agencies was discussed in the Solicitor General’s winning brief in the Supreme Court’s latest nondelegation case and in the en banc 5th Circuit opinion in that case. His Harvard Law Review article on how the judiciary handles the federal government’s disobedience to court orders has been discussed in The Washington Post, The Wall Street Journal, and The New York Times. Parrillo also authored a study that provided the empirical basis for best practices adopted by the Administrative Conference of the United States (ACUS) on the federal government’s ubiquitous but controversial use of guidance documents. Peer scholars at Jotwell, in selecting the “best new scholarship” in law, selected each of these three publications (one of them twice). Parrillo’s most recent article, invited for GW’s annual administrative law issue, reveals and analyzes dramatic variation among industries in their willingness to sue their federal health-and-safety regulators.
Parrillo has testified before Congress, been quoted by the Supreme Court, is a senior fellow of ACUS, and has been an instructor at the New York Historical Society’s graduate institute and an invited speaker before the 2nd Circuit Judicial Conference, the U.S. Department of Justice (in 2019 and again in 2024), the ACLU’s national legal staff, and the Federalist Society’s national convention (two times). He is a recipient of the Law School’s annual teaching award.
