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Jack Heyburn is an associate in the New York office of Gibson, Dunn & Crutcher. He previously practiced in the firm’s Washington, D.C. office from 2019 to 2021. Jack is a member of the firm’s Litigation, Appellate and Constitutional Law, and Administrative and Regulatory practice groups.
He has represented clients in a wide range of high-stakes appellate, administrative law, and commercial litigation matters. His appellate practice has included cases in the Supreme Court of the United States, the U.S. Courts of Appeals for the Second, Third, Fourth, Fifth, Tenth, Eleventh, and D.C. Circuits, as well as numerous state courts of appeals. In addition to trying cases on appeal, Jack has extensive experience at all stages of trial-level litigation—from winning dismissals of lawsuits outright to taking cases to trial.
Representative matters include:
Constitutional and appellate litigation. In his appellate practice, Jack has grappled with some of the most important issues of constitutional law, including the separation of powers and citizenship, and handled appeals with over $1 billion at stake. Recent highlights include:
Complex trial-level litigation. Jack also represents clients in a wide array of complex trial-level litigation matters. These cases run the gambit from those involving federal securities fraud to legal malpractice claims, civil fraud, and sports law. Recent highlights include:
Administrative law. Jack represents clients in a variety of administrative law matters, including those involving the Environmental Protection Agency, the Department of Transportation, the Food and Drug Administration, and the Consumer Financial Protection Bureau, among others. Recent highlights include:
Prior to joining the firm, Jack served as a law clerk to the Honorable Marjorie O. Rendell, U.S. Court of Appeals for the Third Circuit (2018–2019).
Jack graduated cum laude from the University of Pennsylvania Law School in 2018. At Penn, he was a member of the Supreme Court Clinic, led by now-Judge Stephanos Bibas of the U.S. Court of Appeals for the Third Circuit. He was also the winner of the law school’s annual moot court competition, the Edwin R. Keedy Cup. And he was a member of the editorial board of the University of Pennsylvania Journal of Constitutional Law.
Jack has also engaged in legal writing outside of his practice. His scholarship on the drafting of the Constitution, Gouverneur Morris and James Wilson at the Constitutional Convention, 20 U. Pa. J. Const. L. 171 (2017), has been cited in numerous academic journals and books.
Prior to law school, Jack served on the legislative staff for United States Senator Mitch McConnell (2013–2015). In 2013, Jack graduated with a Bachelor of Arts in History from Vanderbilt University.
Jack is admitted to practice in New York and the District of Columbia. He is also admitted to practice in the United States Courts of Appeals for the Third, Fifth, Ninth, Tenth, and Eleventh Circuits and the United States District Court for the District of Columbia.
University of Pennsylvania - 2018 Juris Doctor
Vanderbilt University - 2013 Bachelor of Arts
District of Columbia Bar
New York Bar