Professor Barrett teaches and researches in the areas of federal courts, civil procedure, and statutory interpretation. In 2006, the graduating class at Notre Dame Law School named her Professor of the Year. Her articles have been published in the Virginia Law Review, the Notre Dame Law Review, the Columbia Law Review, The George Washington Law Review, and other journals.
Before joining the faculty at Notre Dame, Professor Barrett served as a visiting associate professor and John M. Olin Fellow in Law at The George Washington University Law School. She also worked as an associate at Miller, Cassidy, Larroca & Lewin in Washington, D.C., where she litigated white-collar crime and religious liberty cases at both the trial and appellate levels. After graduating from law school, she clerked for Judge Laurence H. Silberman on the United States Court of Appeals for the District of Columbia Circuit and for Justice Antonin Scalia on the United States Supreme Court.