Renata B. Hesse is co-head of Sullivan & Cromwell’s Antitrust Group. She is a partner to the Washington’s Sullivan & Cromwell office. Before, she was the Acting Assistant Attorney General responsible for overseeing the Antitrust Division. Previously, Ms. Hesse served as the Deputy Assistant Attorney General for Criminal and Civil Operations and Principal Deputy Assistant Attorney General between 2012 and 2016. During this period, she also served as the Acting Assistant Attorney General from November 2012 to January 2013. She was a career trial attorney in the Division between 1997 and 2006, during the last four years of which she served as the Chief of the Networks and Technology Section. Over the course of her 15 years at the Division, Ms. Hesse has played a leading role in a number of the Division’s most challenging and important investigations and litigations, including serving as the Acting Assistant Attorney General in the Division’s review of the mergers between Comcast and Time Warner and Applied Materials and Tokyo Electron, Deputy Assistant Attorney General overseeing the Division’s challenge to the US Airways/American Airlines merger, and lead attorney during the remedy phase of the Division’s monopoly maintenance case against Microsoft. Before rejoining the Division in 2012, Ms. Hesse served as Senior Counsel to the Chairman of the Federal Communications Commission, where she was responsible for overseeing the FCC’s review of AT&T’s proposed acquisition of T-Mobile. She was also a partner in Wilson Sonsini Goodrich & Rosati’s antitrust group. She has been frequently recognized as a leading and influential antitrust lawyer, with a particular focus in the areas of intellectual property and high technology. Ms. Hesse received her J.D. from the University of California, Berkeley School of Law and her B.A. from Wellesley College.