Speaker details

Biography

Sonia Kuester Pfaffenroth is an antitrust partner with Arnold & Porter. She focuses her practice on helping clients address complex antitrust issues in the US and globally. She primarily represents companies in civil antitrust litigation and government investigations - both civil and criminal. She also assists clients with antitrust compliance and training as well as providing day-to-day counseling on a wide variety of competition issues - pricing, marketing, distribution, contracting, trade association activities, R&D and other collaborations - to assist clients in identifying potential areas of antitrust exposure and to help formulate creative solutions to achieve the desired business objectives while lowering risk. She previously served in the Antitrust Division of the US Department of Justice (DOJ), most recently as Deputy Assistant Attorney General for Civil and Criminal Operations. In that role, Ms. Pfaffenroth was responsible for supervising both civil and criminal antitrust enforcement efforts, as well as the Division's work with antitrust and competition law enforcement agencies worldwide. While at the DOJ, Ms. Pfaffenroth oversaw a number of the Division's most significant matters, including the Division's challenges to the Anthem/Cigna and Aetna/Humana mergers. In addition to her responsibilities with respect to the Division's international program, she also supervised a broad range of legal policy initiatives and competition advocacy efforts. She previously served as Deputy Assistant Attorney General for Civil Enforcement at the Antitrust Division and as Chief of Staff and Senior Counsel.