Catherine O'Connor is an associate in Mayer Brown's Los Angeles office and a member of the Litigation & Dispute Resolution practice focusing her practice on reputational recovery, government and internal investigations and white collar defense. Catherine helps companies and individuals confront the legal and reputational risks associated with allegations of misconduct, including international advocacy experience in Europe and Canada.

She has worked on corporate internal and government investigations of claims of Foreign Corrupt Practices Act violations in Africa, Asia, and the Middle East as well as cross-border disputes and enforcement of foreign judgments. Additionally, she is very active in pro bono matters, including trial representation of a defendant charged with a crime punishable by the death penalty in South Carolina, and representation of individuals seeking asylum, veterans seeking VA benefits, and tenants involved in proceedings before DC Landlord and Tenant Court.

Catherine previously completed a two year clerkship for Chief United States District Judge John Bailey in the Northern District of West Virginia. She served eight years in the United States Marine Corps Reserve including an overseas deployment and serving as a translator in French and Romanian.

Catherine graduated magna cum laude from the University of Minnesota Law School, where she was a member of the Minnesota Journal of Law, Science and Technology and the Intellectual Property Moot Court. Catherine received her BS in economics from the George Washington University, where she served as commencement speaker.


University of Minnesota Law School, JD, magna cum laude
Member, Minnesota Journal of Law, Science and Technology; Member, Intellectual Property Moot Court

George Washington University, BS


  • District of Columbia
  • Not admitted in California. Practicing under the supervision of firm principals.