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Mary Katherine Loos


Mary Katherine Loos is an associate in the Baton Rouge office of Kean Miller. She joined the firm in 2021 and practices in the casualty and mass tort litigation and admiralty and maritime litigation groups.


Mary Katherine earned her B.A., summa cum laude, from Louisiana State University in 2018 and was a member of Phi Beta Kappa. She earned her J.D. from LSU Law Center in 2021, where she was a winner of the 2019 Robert Tullis Moot Court Competition, admitted to Order of the Barristers, and a member of Board of Advocates.


Admitted, Louisiana, 2021; United States District Court for the Eastern, Middle and Western Districts of Louisiana, 2021; United States Court of Appeals, Fifth Circuit, 2021


Wex S. Malone American Inn of Court; Baton Rouge Bar Association; Louisiana State Bar Association; Federal Bar Association; American Bar Association

  • Belly Up With the Bar
  • St. James Episcopal Church Outreach Ministries