Sonja Arndt-Johnson

Sonja Arndt-Johnson is an associate with the Steptoe LLP law firm’s white collar and commercial litigation practices sections in the San Francisco office where she handles a variety of complex litigation. She specializes in data privacy and assists domestic and international businesses with U.S. privacy and data breach compliance. Arndt-Johnson has successfully defended clients against CPRA/CCPA, BIPA, and wiretap allegations while drafting complex multi-jurisdictional privacy policies, terms of use and service agreements, DMCA policies, and prohibited content policies. As a former Assistant U.S. Attorney, she also defends clients subject to white collar investigations from pre-indictment through to sentencing.

Arndt-Johnson has extensive courtroom and trial experience through her prior government service. She practiced in the criminal section of the United State Attorney’s Office in Washington, D.C., where she ran complex investigations, presented cases before grand juries, and successfully took cases through trial and sentencing. While at the USAO-DC she also worked in the Appellate Section. Before joining the U.S Attorney’s Office, Arndt-Johnson began her legal career as a Deputy District Attorney in the Santa Clara County District Attorney’s Office in California. 

Prior to practicing law, Arndt-Johnson was a congressional aide and director of a Congressional satellite office where she advised members of Congress on matters involving regulatory issues, investigations, legal compliance, and federal appropriations.

Arndt-Johnson earned her bachelor’s degree at the University of California Santa Cruz, a leader development certification at the U.S. Army War College, and her JD at the University of California Hastings College of Law. 

Full bio available online.