David O'Neil
Adjunct Professor of Law


Adjunct Associate Professor David O'Neil practices Supreme Court and appellate litigation with Wilmer Cutler Pickering Hale and Dorr. After graduating magna cum laude from Harvard Law School in 2000, Professor O'Neil clerked for Judge Robert D. Sack on the Second Circuit and then for Justice Ruth Bader Ginsburg on the Supreme Court. In his practice, Professor O'Neil assists in formulating strategy for cases before the Supreme Court, drafts petitions for certiorari and briefs on the merits, and helps to prepare advocates for oral argument. The appellate group of which David is part is led by former Solicitor General Seth Waxman and in the last two Terms has litigated 10 Supreme Court cases -- more than any other firm. Professor O'Neil's publications have appeared in a number of places, including the Harvard Law Review.