Julie Siebert-Johnson

1275 Drummers Lane
Wayne, PA 19087

Office: (267) 930-4005
Fax: (267) 930-4771


Villanova University School of Law
Juris Doctor, 2008

University of Pennsylvania
Bachelor of Arts
Cum Laude, 2003


  • Pennsylvania
  • New Jersey
  • USCA, Eleventh Circuit
  • USCA, Sixth Circuit
  • USCA, Fifth Circuit
  • USDC, Eastern District of Pennsylvania
  • USDC, District of New Jersey
  • USDC, Eastern District of Michigan
  • USDC, Central District of Illinois
  • USDC, Southern District of Illinois
  • USCD, District of Colorado

Julie Siebert-Johnson is an associate attorney at Mullen Coughlin. Ms. Siebert-Johnson focuses her practice on assisting clients with data privacy events, network security, and incident response. In the event of a breach, Ms. Siebert-Johnson counsels her clients throughout their investigation including coordinating with forensic teams to determine the scope of the breach. Further, Ms. Siebert-Johnson advises clients regarding the interpretation of state, federal, and international data privacy laws, and how they apply to each client’s unique circumstances. Ms. Siebert-Johnson also works with her clients to satisfy any notification duties created by a data event, and to respond to any resulting regulatory inquiry.

Prior to joining Mullen Coughlin, Ms. Siebert-Johnson worked for a Philadelphia-area law firm specializing in complex civil litigation on behalf of plaintiffs. Ms. Siebert-Johnson concentrated her practice in the areas of the Employee Retirement Income Security Act of 1974 (ERISA) and fiduciary breach litigation. Ms. Siebert-Johnson litigated cases on behalf of her clients in District Courts across the country, before many Circuit Courts of Appeals, and to the United States Supreme Court.