Catherine Deist focuses her practice on criminal and civil litigation matters. A former Air Force JAG, Catherine was an invaluable member of Mukasey Frenchman’s 2021 trial teams, cross-examining witnesses in major federal criminal and civil trials and securing a complete acquittal in a case in New Mexico. In 2019, Catherine was part of the team that successfully defended Navy SEAL Edward Gallagher, in a criminal trial that gained national acclaim.

In addition to her litigation experience, Catherine has experience in appellate and post-conviction matters, and has advised on thousands of government contractual matters.  She also represents clients who are under investigation.  Notably, she served as the principal legal investigator and sole legal advisor for a $40 million wrongful death action against the Air Force regarding a civilian aircraft crash on a military installation.  Her report was presented to the DOJ and resulted in a favorable outcome for the Air Force.

Catherine is also a valuable member of the Mukasey Frenchman healthcare practice.  She is among a select few attorneys in the country practicing in the area of Assisted Reproductive Technology (ART).  A fast-changing area of law that varies vastly from state to state, Catherine provides experienced counsel on the legal issues involved in utilizing ART.

Admitted to practice only in the States of Virginia and Texas.


  • Texas A&M University, B.A. in English Rhetoric
  • St. Mary’s University School of Law, Cum Laude
  • Received advanced education and training through the Judge Advocate General’s School for both the Air Force and the Army