Onalee Yousey is an associate in Armstrong Teasdale’s Litigation practice group, where she represents clients in various civil litigation matters and counsels clients on a range of labor and employment issues.

Onalee regularly assists employers across industries in developing policies and procedures, advising on noncompete and trade secret matters, conducting workplace investigations, and other employment and labor issues. Onalee’s experience extends to all phases of discovery, trial preparation, and negotiation of settlements, and she is well-versed in case strategy, pretrial briefing, and dipositive motion practice.  Onalee has worked on matters involving discrimination, retaliation, unfair labor practices, white collar investigations, contract disputes, and a range of state and federal employment laws. Onalee also served as the Prosecuting Attorney for the City of Crestwood, Missouri, for several years.


Onalee was a summer associate at Armstrong Teasdale prior to joining the firm full time. While in law school she also gained experience representing indigent clients in a variety of civil matters through SLU Law Legal Clinics. While in law school, Onalee interned at the U.S. Attorney’s Office for the Eastern District of Missouri and served as a judicial extern for Judge Raymond C. Gruender of the Eighth Circuit Court of Appeals.


  • Saint Louis University School of Law  (J.D., summa cum laude, 2020)
    • Order of the Woolsack
    • Dean’s List
    • Public Interest Law Group
    • Saint Louis University Law Journal (Staff Editor )
  • University of Iowa  (B.A., B.S., with honors and distinction, 2013)
    • International Studies
    • Political Science
    • Critical Language Scholarship Program (Arabic), Tangier, Morocco (Summer 2013)


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

Professional Activities

  • The Missouri Bar
  • Bar Association of Metropolitan St. Louis (BAMSL)
  • Theodore McMillian Inn of Court (Pupil)

Charitable and Civic Involvement

  • University City Summer Band (2014-present)
  • AmeriCorps VISTA (2014-15)


  • Women's Justice Award, Missouri Lawyers Weekly (2024)
  • Academic Excellence Awards: Contracts II, Civil Procedure II, Immigration Law, Criminal Procedure - Investigation
  • Alpha Sigma Nu
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