Benjamin B. Hallmark

Benjamin B. Hallmark

  • 512.404.6707
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  • Thompson & Knight LLP
    98 San Jacinto Boulevard
    Suite 1900
    Austin, TX 78701 USA
View Benjamin B. Hallmark's
Ben Hallmark focuses his practice on administrative law and litigation matters, including contested cases before state agencies such as the Public Utility Commission of Texas. He has represented clients in a wide range of litigation and appellate matters involving energy issues, deceptive trade practice claims, trade secrets, and other complex commercial issues.


Public Law

  • Recurring representation of a trade association of industrial energy consumers on contested matters before the Public Utility Commission, Courts of Appeal, and Supreme Court of Texas
  • Assisted in the representation of landowners in inverse condemnation matter involving a regulated electric transmission service provider and the placement of its transmission lines in a manner that affects saltwater disposal operations


  • Assisted in the representation of a national healthcare company seeking relief for antitrust violations, defamation, business disparagement, and tortious interference with contract and prospective business relations concerning the practice of allergy testing and immunotherapy
  • Assisted in the representation of a school district in an expedited trial and obtained final judgment in favor of the client, including successfully defeating a temporary restraining order, allowing a bond election to proceed as planned
  • Assisted in the representation of a defendant in a trade secret case in state court before a jury in Houston, which resulted in a take nothing judgment in favor of the client

Prior Experience

  • Law Clerk, Honorable Nancy F. Atlas, U.S. District Court, Southern District of Texas, 2009-2010


  • The Best Lawyers in America® by Woodward/White Inc. (Administrative/Regulatory Law, Energy Regulatory Law); 2019

Activities (Memberships/Affiliations)

  • Member, State Bar of Texas; Public Utility Law Section
  • Member, Austin Bar Association