Sonja Arndt-Johnson is a Special Counsel at Buchalter and a member of the firm’s Privacy & Data Security and White Collar & Investigations practice groups, as well as the San Francisco Office’s Administrative Litigation Chair. A former federal and local prosecutor and advisor to Members of Congress, she counsels companies, executives, and individuals facing government investigations, sensitive disputes, and data privacy challenges. She delivers strategic, discreet counsel at the intersection of legal, business, and reputational risk.
Drawing on experience at the U.S. Department of Justice, including the U.S. Attorney’s Office for the District of Columbia, the Office of International Affairs, and the Computer Crime and Intellectual Property Section, as well as the Santa Clara County District Attorney’s Office, Ms. Arndt-Johnson brings a prosecutor’s perspective to high-stakes investigations, enforcement matters, and crisis situations. Before entering the legal profession, she advised Members of Congress on national security and foreign affairs, giving her a distinctive understanding of the governmental, regulatory, and geopolitical dynamics that shape complex matters.