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John Greil is a Clinical Professor at the University of Texas School of Law, where he directs the Law and Religion Clinic. He is a leader in the use of Generative AI in legal practice, having secured grant funding to support its integration and trained practicing attorneys and professors on both the capabilities and limitations of large language models.
Greil has published scholarship on competition law, originalism, and property rights in leading law journals. He also serves as faculty advisor to the Texas Review of Law & Politics and teaches a seminar on Understanding Conservative Legal Thought.
Before entering academia, Greil was a litigation and antitrust associate at a global law firm, where he represented clients in administrative agencies, and trial and appellate courts around the world. His practice has included constitutional litigation at the highest levels: he has argued appeals in federal circuit and state supreme courts and has represented national religious organizations and leading public interest groups before the U.S. Supreme Court. He clerked for Chief Judge Jennifer Walker Elrod of the U.S. Court of Appeals for the Fifth Circuit, Judge Paul Barbadoro of the District of New Hampshire, and Judge Nathaniel M. Gorton of the District of Massachusetts. Greil earned his J.D. from Harvard Law School, where he served on the Harvard Journal of Law & Public Policy, and holds a bachelor’s degree from the University of Notre Dame.