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About me

Mr. De Leon is the founder of De Leon & Washburn, P.C., which was established on July 1, 1977. His practice focuses on the regulatory needs of insurance companies of all sizes, including transactional, and litigation matters. Prior to establishing the firm, Mr. De Leon was the General Counsel of the Texas State Board of Insurance, now known as the Texas Department of Insurance. From 1978 to 1987, Mr. De Leon served as Legal Counsel to the Texas State Board of Pharmacy. Since 1990 Mr. De Leon has held the rank of Adjunct Professor at the University of Texas School of Law in the area of insurance regulation. Mr. De Leon was among the first group of attorneys Board Certified in Administrative Law by the Texas Board of Legal Specialization in 1989. Mr. De Leon is fluent in Spanish.


Mr. De Leon has tried cases to jury verdict and to the Court in various state court venues in Texas, and has argued cases before most of the state appellate courts of Texas and the Texas Supreme Court. In 2006, Mr. De Leon received a rare ruling from the bench before the State Office of Administrative Hearings, granting an insurance agent’s license application in a contested case hearing involving the Texas Department of Insurance. Mr. De Leon has worked with clients on transactional matters and the drafting of documents to bring transactions to a close. The transaction documents have included buy/sell agreements,loan documents, guarantees, confidentiality agreements and employment agreements. Mr. De Leon has also provided expert witness services on insurance issues as well as government relations services to clients on legislative matters.


Mr. De Leon has been married to Arleigh Stoune De Leon since September 15, 1973. Mr. and Mrs. De Leon are both native Austinites. They have raised three boys who now are successful in their own professional pursuits. He is a Life Fellow of the Texas Bar Foundation, and has served as President of both the UT Law Alumni Association and the UT Ex-Students’ Association.




Practice areas


  1. Administrative Law: 35%
    42 years
  2. Commercial Real Estate: 25%
    42 years
  3. Appeals: 15%
    42 years
  4. Insurance: 15%
    42 years
  5. Government: 10%
    42 years


Payment types:

Check, Credit card

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Contact info

De Leon & Washburn, PC

901 S Mo Pac Expy Ste 230
Barton Oaks Plaza V
Austin, TX, 78746-5776


TXEligible To Practice In Texas 197307/16/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
The Best Lawyers in AmericaU.S. News2015
The Best Lawyers in AmericaU.S. News2014
The Best Lawyers in AmericaU.S. News2013
Super LawyerThompson Reuters2012
The Best Lawyers in AmericaU.S. News2012
Super LawyerThompson Reuters2011
The Best Lawyers in AmericaU.S. News2011
Distinguished AlumnusUniversity of Texas Ex-Students Association2010
The Best Lawyers in AmericaU.S. News2010
Super LawyerThompson Reuters2010
Super LawyerThompson Reuters2009
The Best Lawyers in AmericaU.S. News2009
The Best Lawyers in AmericaU.S News2008
Super LawyerThompson Reuters2008
Super LawyerThompson Reuters2007
The Best Lawyers in AmericaU.S. News2007
Presidential Citation for Exemplary ServiceThe University of Texas2007
Super LawyerThompson Reuters2006
Super LawyerThompson Reuters2005
Super LawyerThompson Reuters2004
Work experience
TitleCompany nameDuration
Shareholder and FounderDe Leon & Washburn, P.C.1977 - Present
Association namePosition nameDuration
Brackenridge Development CouncilMember2012 - Present
Children at Heart Ministries Board of DirectorsMember2009 - Present
Selection Committees for the Dean of the University of Texas School of LawMember 1995 and 2000N/A
University of Texas Commission of 125MemberN/A
University of Texas System Chancellor’s CouncilMember of the Executive CommitteeN/A
University of Texas Development BoardLife MemberN/A
University of Texas College of Education Foundation Advisory CouncilMember and past ChairN/A
Advisory Council of the University of Texas Division of Diversity and Community EngagementChairN/A
University of Texas Foundation, Inc.President, Board of DirectorsN/A
Austin Bar AssociationMemberN/A
State Bar of TexasMemberN/A
Search Committee for Vice President for Student Affairs for the University of TexasMember2011 - 2012
University of Texas Ex-Students’ AssociationPresident2004 - 2005
School nameMajorDegreeGraduated
University of Texas School of LawLawJD - Juris Doctor1973
University of Texas System, AustinEducationBS - Bachelor of Science1970