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Mascott, Jennifer Lee
Federal Judicial Service:
Judge, U.S. Court of Appeals for the Third Circuit
Nominated by Donald J. Trump on September 2, 2025, to a seat vacated by Kent A. Jordan. Confirmed by the Senate on October 9, 2025, and received commission on October 10, 2025.
Education:
University of Maryland, B.S.
George Washington University Law School, J.D., 2006
Professional Career:
Law clerk, Hon. Brett M. Kavanaugh, U.S. Court of Appeals for the District of Columbia Circuit, 2006-2007
Law clerk, Hon. Clarence Thomas, Supreme Court of the United States, 2008-2009
George Washington University Law School, 2011-2013, 2015-2017; professorial lecturer in law, 2011, 2012, 2012-2013, 2015; Olin/Searle Fellow, 2016-2017
Olin/Searle Fellow, Georgetown University Law Center, 2015-2017
Private practice, Arlington, Virginia, 2017-2019
Assistant professor of law, George Mason University Antonin Scalia Law School, 2017-2024 (on leave 2019-2021); co-director, Administrative Law and Supreme Court Clinics, 2017-2018; faculty director and founder, Separation of Powers Student Litigation Clinic, 2021-2024; co-executive director, C. Boyden Gray Center for the Study of the Administrative State, 2021-2024
U.S. Department of Justice, 2019-2021; deputy assistant attorney general, Office of Legal Counsel, 2019-2020, 2020-2021; associate deputy attorney general, 2020-2021
Associate professor of law, Catholic Law School, 2024-2025; founder and director, Separation of Powers Institute and Student Litigation Clinic, 2024-2025
Senior counsel, White House Counsel's Office, 2025