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Tiauna N. Mathieu

Tiauna N. Mathieu

Senior Associate

101 Constitution Avenue, NW
Suite 900
Washington, D.C., 20001
T 202.689.2842
tiauna.mathieu@nelsonmullins.com
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Tiauna represents companies and individuals in high-stakes commercial and white-collar litigations. She also has extensive experience helping clients identify and mitigate financial fraud risks. Tiauna maintains an active pro bono practice, which predominantly consists of helping low-income individuals navigate the criminal legal system.

Tiauna represents companies and individuals in high-stakes commercial and white-collar litigations. She also has extensive experience helping clients identify and mitigate financial fraud risks. Tiauna maintains an active pro bono practice, which predominantly consists of helping low-income individuals navigate the criminal legal system.

Tiauna N. Mathieu

Experience

The following is a selected sampling of matters and is provided for informational purposes only. Past success does not indicate the likelihood of success in any future matter.

Representative Matters

  • Obtained reversal of $5.4 million default judgment in Ninth Circuit appeal related to violations of discovery orders.
  • Argued novel constitutional issue in the U.S. District Court for the Eastern District of Virginia.
  • Assisted a multinational oil and gas company regarding an internal review of compliance with economic sanctions.
  • Provided compliance trainings to executives of “supermajor” oil and gas company.

Previous Professional Experience 

  • Associate, International law firm (2021–2025)

Publications

  • Co-Author, Bribery Settlement Gives Insight on DOJ Policies, Law360 (Jan. 5, 2024)

Speaking Engagements

  • Speaker, “ABA Export Controls Year-in-Review,” American Bar Association International Law Section Webinar (March 28, 2025)
The following is a selected sampling of matters and is provided for informational purposes only. Past success does not indicate the likelihood of success in any future matter.

Representative Matters

  • Obtained reversal of $5.4 million default judgment in Ninth Circuit appeal related to violations of discovery orders.
  • Argued novel constitutional issue in the U.S. District Court for the Eastern District of Virginia.
  • Assisted a multinational oil and gas company regarding an internal review of compliance with economic sanctions.
  • Provided compliance trainings to executives of “supermajor” oil and gas company.

Previous Professional Experience 

  • Associate, International law firm (2021–2025)

Publications

  • Co-Author, Bribery Settlement Gives Insight on DOJ Policies, Law360 (Jan. 5, 2024)

Speaking Engagements

  • Speaker, “ABA Export Controls Year-in-Review,” American Bar Association International Law Section Webinar (March 28, 2025)

Professional Activities

  • Director of Membership, Her Legal Circle

Community

  • Life Group Leader, The District Church

Tiauna represents companies and individuals in high-stakes commercial and white-collar litigations. She also has extensive experience helping clients identify and mitigate financial fraud risks. Tiauna maintains an active pro bono practice, which predominantly consists of helping low-income individuals navigate the criminal legal system.

Experience

The following is a selected sampling of matters and is provided for informational purposes only. Past success does not indicate the likelihood of success in any future matter.

Representative Matters

  • Obtained reversal of $5.4 million default judgment in Ninth Circuit appeal related to violations of discovery orders.
  • Argued novel constitutional issue in the U.S. District Court for the Eastern District of Virginia.
  • Assisted a multinational oil and gas company regarding an internal review of compliance with economic sanctions.
  • Provided compliance trainings to executives of “supermajor” oil and gas company.

Previous Professional Experience 

  • Associate, International law firm (2021–2025)

Publications

  • Co-Author, Bribery Settlement Gives Insight on DOJ Policies, Law360 (Jan. 5, 2024)

Speaking Engagements

  • Speaker, “ABA Export Controls Year-in-Review,” American Bar Association International Law Section Webinar (March 28, 2025)

Education

  • Georgetown University Law Center, JD (2019)
    • Senior Articles Editor, Georgetown Journal of Law & Modern Critical Race Perspectives 
    • President, Christian Legal Society 
    • Member, Black Law Students Association
    • Alan J. Goldstein Memorial Award 
  • Hampton University, BS, Criminal Justice and Criminology, summa cum laude (2016)

Admissions

  • District of Columbia
  • New York
  • U.S. District Court for the District of Columbia

Clerkships

  • Law Clerk, The Honorable Todd E. Edelman, Superior Court of the District of Columbia (Sept. 2019 - Oct. 2020)

Practice Areas

  • Director of Membership, Her Legal Circle
  • Life Group Leader, The District Church