Member Directory
Member Directory

Tatum O' Brien

O'Keeffe O'Brien Lyson
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Tatum O' Brien
O'Keeffe O'Brien Lyson

Admitted to Practice in

North Dakota
South Dakota
Federal Courts in North Dakota
Federal Courts in South Dakota
Federal Courts in Minnesota
8th Circuit Court of Appeals

Professional Memberships

Minnesota State Bar Association
State Bar Association of North Dakota
Cass County Bar Association
North Dakota Association for Justice, Executive Board, past President
Clay County Bar Association
UND Law Mentor Program
South Dakota Bar Association
Criminal Justice Act Panel for Federal Appointments
Past President - North Dakota Association for Criminal Defense Lawyers
American Association for Justice - Revitalization Governor, Board of Governors
Injury Board
Member - American Association of Premier DUI Attorneys
Minnesota Association for Justice

When you think of a quality that describes the attorney working for you, does "tenacious" come to mind? That's what Tatum's clients say about her.

Tatum was born and raised in Western North Dakota. Her extensive experience in and out of the courtroom, coupled with a work ethic that simply doesn't stop, has earned her a solid reputation as an attorney who represents her clients with tenacity and skill.

Tatum's areas of concentration include criminal law, personal injury, and general litigation. Prior to joining the firm, she was a law clerk for all eight judges in the East Central Judicial District, Cass County, North Dakota.

Tatum earned her undergraduate degree in Sociology with criminal justice emphasis from North Dakota State University, Fargo, North Dakota. She graduated with distinction from the University Of North Dakota School Of Law. While in law school, Tatum was a law clerk at the Morley Law Firm, Grand Forks, North Dakota. Tatum also spent a summer as an extern with the US Attorney's Office, District of North Dakota.

Over her years in practice, Tatum has become recognized as a highly skilled and experienced attorney representing clients in criminal and personal injury cases. She has extensive experience helping clients who have experienced issues of medical malpractice, serious personal injury, and wrongful death.

Professional Involvement

Tatum believes being involved in local, regional and national organizations helps her become a more well-rounded advocate for her clients. Her involvement in professional organizations helps her learn from others, which in turn assures she brings the best representation possible for her clients. She works hard to advocate for change on the state and national level.

Served as President of the North Dakota Association for Justice 2015-2016. She continues to serve on the Executive Committee of the Board of Governors.
In 2012 Tatum was appointed to the Board of Governors of the American Association of Justice
Member of the Injury Board - a national organization of trial attorneys focused on improving their practices through education and local community involvement

Community Involvement

First Lego League Coach - Kennedy Elementary (Fargo)


Dalwhinnie Award for Exemplary Trial Work by North Dakota Association for Criminal Defense Lawyers in 2010
Top 100 Trial Lawyers, National Trial Lawyers
SuperLawyer (annually 2013 - present)
Global Directory of Who's Who - Attorney Section

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