Gibson, Dunn & Crutcher has brought on Munger, Tolles & Olson lifer Rosemarie Ring to join its litigation practice in San Francisco.

Ring began her legal career as a law clerk at the U.S. Court of Appeals for the Ninth Circuit. She joined Munger in 2002. Ring ”is a first-chair litigator with a proven track record of defending companies in high-stakes commercial litigation and high-profile regulatory investigations,” Barbara Becker, chair and managing partner of Gibson Dunn, said in a statement.