Soledad O'Donnell is a partner in the Litigation & Dispute Resolution practice, where she focuses primarily on International Arbitration disputes in Latin America, and is a member of the firm’s International Arbitration Coordinating Committee. Prior to joining Mayer Brown in 2012, Soledad served as a Law Clerk for the Honorable Richard C. Tallman, United States Court of Appeals for the Ninth Circuit, and worked for several years as a Litigation associate for a Chicago-based international law firm. Prior to law school, Soledad was a paralegal for the Antitrust Division of the United States Department of Justice. Soledad is a Center for Conflict Resolution Certified Mediator and is a native Spanish speaker.

Soledad received her JD from Northwestern University School of Law and her BA in political science, magna cum laude, from the University of Notre Dame.  Soledad is admitted to practice in the state of Illinois.

Spoken Languages

  • Spanish


Among other matters, Soledad’s experience includes the following engagements:

  • Representing a Latin American oil company in an ICDR dispute over breaches of representations and warranties involving tax, environmental, labor, bankruptcy and other liabilities in a stock purchase agreement.
  • Representing two companies that provide drilling services in the geothermal industry in an ICC dispute arising from a contractual dispute in South America.
  • Representing a party in an UNCITRAL arbitration arising from a contractual dispute related to a coal-bed methane project in Asia.
  • Representing a private shareholder in an ICC dispute against a State-owned company related to the management of a power generating company in the Caribbean.


Northwestern University School of Law, JD

University of Notre Dame, BA, magna cum laude


  • Illinois
  • Not admitted in Texas. Practicing under the supervision of firm principals.


  • US District Court for the Northern District of Illinois
  • US Court of Appeals for the Sixth Circuit
  • US Court of Appeals for the Seventh Circuit
  • US Court of Appeals for the Ninth Circuit