Zachary Tripp, an assistant to the U.S. solicitor general, has joined Weil, Gotshal & Manges as partner and co-head of the firm’s appellate practice.

Tripp, who joined the firm’s Washington, D.C., office Monday, adds significant heft to Weil’s appellate practice. Tripp has argued 11 cases before the U.S. Supreme Court and filed more than 100 briefs at the certiorari stage, Weil said, noting his areas of expertise include bankruptcy, antitrust, intellectual property and securities and foreign state immunity.