Casey L. Matthiesen



Casey’s past – adopted at birth and growing up on a rural family farm in southwestern Minnesota – is a prologue to her personal values and professional passions. She is the third enrolled member in the history of the Yankton Sioux Tribe to become an attorney. Today her law practice focuses on taking difficult cases and re-writing the odds for her clients in high stakes litigation.

The lessons Casey learned on the farm continue to guide her as a lawyer: tenacity, creativity, old fashioned hard work, and most importantly never giving up on a neighbor in need. Casey’s unique life experiences are an important asset to her clients because they guide her creative and tenacious approach to difficult situations. Before joining Robins Kaplan, Casey studied Art & Italian language in Florence, Italy and worked for a highly regarded lobbyist during a South Dakota Legislative Session. Her next steps took her to the doors of the British Parliament in London, where she worked for a Member of the House of Commons. She has been an Associate Student at the London School of Economics and a law clerk for the Hennepin County Attorney’s Office.

  • Cozen O’Connor Bankruptcy Litigation Clinic (2020)
  • Leadership Council on Legal Diversity Scholar (2018)
  • Minnesota American Indian Bar Association Scholarship (2019, 2020)
  • Hennepin County Bar Association – New Lawyers Section, Co-CLE Director
  • The Sanneh Foundation, Associate Board Member 
  • Twin Cities Diversity in Practice, Mentor
  • University of St. Thomas School of Law Mentor Externship Program, Mentor 
Bar Admissions
  • Minnesota
  • North Dakota
  • U.S. District Court, District of Minnesota
  • U.S. District Court, District of North Dakota
  • University of St. Thomas School of Law, J.D. (2020) 
  • University of South Dakota, B.A., magna cum laude (2017)
Professional Associations
  • President of Minnesota American Indian Bar Association
  • Federal Bar Association
  • Hennepin County Bar Association 
  • Minnesota Association for Justice
  • Minnesota State Bar Association
  • Minnesota Women Lawyers 
  • North Dakota Association for Justice
  • Twin Cities Diversity in Practice

“Art, Literature and the Law,” Hennepin Lawyer, Vol. 90, Issue 4 (July/August 2021)

  • Current Issues on American Indian Law and Policy 
    Panelist, In-House CLE for a Financial Institution (October 12, 2021)


Links to full publications and news releases.


British Parliament and the South Dakota Legislature
University of South Dakota Department of Political Science Farber Newsletter, Vol. 71, 35
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