An associate in Armstrong Teasdale’s Litigation practice group, Casey Waughn advises clients of all sizes on complex statutory and regulatory matters. She brings to her role diverse experience gained through previous positions relating to public policy, as well as criminal and civil litigation.

Casey’s broad skillset includes drafting motions, examining and preparing evidence, conducting depositions and legal research, reviewing contracts and data sharing agreements, writing memoranda on a variety of complex issues, and trial preparation. Her knowledge includes issues relating to state, federal and international privacy legislation, data incident response, derivative and cryptocurrency regulations, wire and tax fraud, violations of the False Claims Act, and evidentiary matters, including expert witness testimony. In addition, knowledge of compliance issues gained through previous experience with a financial services firm enables Casey to provide guidance to clients on mitigating risk and conforming to industry requirements.

A Certified Information Privacy Professional for the United States (CIPP/US), Casey is a frequent speaker on data privacy topics, and has published multiple articles and practice guides on privacy matters.


Prior to joining the firm, Casey was a policy fellow at the Future of Privacy Forum, a policy think tank dedicated to privacy issues. Before that, she spent a year with the Circuit Attorney’s Office of the City of St. Louis, and six months as an extern in the Division of Enforcement at the U.S. Commodity Futures Trading Commission. Casey also clerked at the U.S. Attorney’s Office for the Southern District of Illinois during law school. In her state and federal government roles, Casey served as lead or secondary counsel on several cases that were tried to verdict, and assisted with dozens of investigations.

Casey began her career in the financial services industry, where she worked in marketing and compliance.


  • Washington University School of Law  (J.D., cum laude, 2020)
    • Certificate in Public Interest Law
    • CALI Excellence for the Future Award – Digital Civil Liberties
    • Honor Scholar Award
    • Dean’s Service Award
    • Washington University Journal of Law and Policy (Executive Articles Editor)
    • Technology and Privacy Society (President)
  • Saint Louis University  (B.A., magna cum laude, 2017)
    • Communication, Journalism and Media Studies
    • James D. Collins Award
    • Alpha Sigma Nu Honor Society


  • Missouri
  • Illinois
  • U.S. District Court, Eastern District of Missouri
  • U.S. District Court, Southern District of Illinois

Professional Activities

  • Women Lawyers’ Association of St. Louis
  • Bar Association of Metropolitan St. Louis
  • International Association of Privacy Professionals (Co-chair, St. Louis Chapter)
  • Missouri Bar Leadership Academy (2021-2022)
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