Warren Harris heads the firm's appellate practice. He is immediate past President of the Texas Supreme Court Historical Society, past Chair of the Houston Volunteer Lawyers Program, past President of the University of Houston Law Alumni Association, past Chair of the Texas Bar Foundation Fellows, and a director of the Houston Bar Association. Mr. Harris is a past chair of the State Bar of Texas Appellate Section, the Houston Bar Association Appellate Practice Section, the IADC Appellate Practice Committee, and the ABA Tort and Insurance Practice Section Appellate Advocacy Committee. He is a frequent lecturer and has spoken at more than 100 legal education seminars.

Mr. Harris has handled hundreds of appeals and original proceedings in the Texas Supreme Court, United States Supreme Court, and state and federal courts of appeals, including handling many cases that were originally tried by other law firms. He also assists in pretrial and trial strategy, preservation of error at trial, preparation of and arguing jury charges, post-verdict proceedings in trial courts, and analysis of the trial record for appellate potential.