Kathryn KimballMizelle (Kat)


Washington + 1.202.879.3611 Miami + 1.305.714.9700

Kat Mizelle focuses on appeals and complex civil and criminal litigation. As a former federal prosecutor, she has significant argument experience in federal district court and has secured guilty verdicts in jury trials in state court. She also has advised on numerous appeals on behalf of the federal government.

Prior to joining Jones Day, Kat served in the Tax Division at the Department of Justice (DOJ), where she prosecuted white collar offenses and led grand jury investigations of multimillion dollar tax shelters and fraudulent schemes. She also was a Special Assistant U.S. Attorney in the Eastern District of Virginia, where she prosecuted one of the largest human trafficking cases in that district's history.

In addition, Kat served as counsel to the Associate Attorney General. In that role, she oversaw the Tax Division, advised on appeals and trials, developed DOJ-wide regulatory reform policy, led DOJ's efforts to defend free speech on college campuses, and testified before the Administrative Conference of the United States.

Kat has served as a law clerk at every level of the federal judiciary, including for Justice Clarence Thomas of the U.S. Supreme Court. Kat also serves as an adjunct professor at the University of Florida (UF). In January 2020, she will co-teach the course "Religion Clauses of the First Amendment" with Justice Thomas at UF.

Speaking Engagements

Speaking Engagements Prior to Jones Day

October 17, 2019
The Role of the Supreme Court in the U.S. Federal System, The Honourable Society of the Middle Temple

September 27, 2019
In Pursuit of Truth: How the Framers Protected Liberty in the First Amendment, Constitution Day Lecture
Geneva College

September 23, 2019
Career in Public Service, Congressional Classroom Speaker
Randy Roberts Foundation

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