International law firm Weil, Gotshal & Manges LLP announced that Mark A. Perry has joined the Firm as Co-Head of the Appellate practice, based in Weil’s Washington, D.C. office.

“Mark is widely recognized as one of the most preeminent appellate lawyers and legal strategists in the United States,” said Weil Executive Partner Barry Wolf. “Not only is Mark a fantastic addition to our national Appellate practice, he is also incredibly important to our strategic growth in Washington, D.C., and we are delighted to welcome him to the Firm.”

Elizabeth Weiswasser, Co-Chair of Weil’s global Litigation Department, commented: “Mark has argued several landmark decisions before the U.S. Supreme Court and has argued dozens of major cases for Fortune 50 clients in the federal courts of appeals. He has a robust complex commercial litigation practice at both the trial and appellate levels as well as special expertise in class actions. Few lawyers in the country can match the range and depth of Mark’s knowledge and experience. We are thrilled to have him joining Weil.”

Mark joins Weil from the Washington, D.C. office of Gibson, Dunn & Crutcher LLP, where he was a partner and served as Co-Chair of the nationwide Appellate and Constitutional Law Practice Group. His practice focuses on complex commercial litigation at both the trial and appellate levels. Mark has been lead appellate counsel to major companies in significant securities, intellectual property and employment cases; he also frequently serves as chief legal strategist in district court cases involving a wide range of business issues. Before entering private practice, Mark served as a law clerk to Justice Sandra Day O’Connor of the Supreme Court of the United States, and to Judge Alex Kozinski of the United States Court of Appeals for the Ninth Circuit.

“Weil has a fantastic Appellate practice, a formidable global Litigation Department, an outstanding Firm culture and incredibly talented lawyers across the firm,” said Mark. “I look forward to working again with my former partners Drew Tulumello and Chantale Fiebig to help grow Weil’s presence in Washington, D.C. And I am excited to collaborate with an exceptional team of lawyers across the Weil platform to achieve successful outcomes for our sophisticated global clients.”