Anderson, Lehrman, Barre & Maraist
Over 50 Years of Legal Experience Diligent, Dedicated, Aggressive Managing Diverse Areas Of Practice Adeptly Handling Complex Legal Issues

Douglas Dewitt McLallen Sr.

Douglas Dewitt McLallen Sr.

Corpus Christi, Texas

Douglas D. McLallen is a graduate of Southwestern University, Georgetown and South Texas College of Law. He first practiced in Houston in the areas of Mortgage Document Preparation, Mortgage Servicing, Commercial Litigation, Personal Injury and Creditor's Rights. After moving to Corpus Christi in 1997, he continued practicing in the area of Creditor's Rights and began practicing in the areas Oil and Gas, Personal Injury, Construction Litigation and Complex Tort Litigation. His practice is now comprised of Oil and Gas matters, Medical Malpractice Defense, Commercial and Construction Litigation, Personal Injury Litigation and Probate Litigation.

Mr. McLallen has a state-wide Oil and Gas practice, most recently representing numerous clients in the Permian Basin area. Mr. McLallen represents land, mineral and royalty owners in oil, gas & mineral law, environmental matters and litigation. He  succesfully litigated mineral conveyance issues before the Texas Sureme Court, achieving a victory for his client with significant importance to the oil & gas industry in Texas, which has been described by the legal press as, "...a watershed decision with sweeping implications for the oil and gas industry." (State Bar of Texas, Consumer & Commercial Law Section - Energy Law Today, May 27, 2017).

Mr. McLallen negotiates oil and gas leases, lease options and pipeline / easement agreements.  His practice includes the litigation relating to mineral and royalty interests, title to mineral interests and royalties, surface use agreements, and purchase and sale as well as development agreements. He has extensive litigation experience in cases relating to produced water and subsurface trespass issues as well as surface use and contamination related issues.

Mr. McLallen is availible for consultation in person or by teleconference. He may be contacted at by calling 361-884-4981 or by emailing Mr. McLallen at [email protected] 


Areas of Practice

  • Oil & Gas
  • Construction Litigation
  • Medical Malpractice Defense
  • Personal Injury Defense
  • Commercial Litigation
  • Oil and Gas Litigation
  • Oil and Gas
  • 85% Oil and Gas
  • Litigation

Litigation Percentage

  • 90% of Practice Devoted to Litigation

Bar Admissions

  • Texas, 1993
  • U.S. District Court Southern District of Texas, 1994
  • U.S. District Court Northern District of Texas, 1994
  • U.S. District Court Eastern District of Texas, 1994


  • Houston College of Law, Houston, Texas
    • J.D. - 1993
  • South Western University, Georgetown, Texas
    • B.A. - 1989

Representative Clients

  • JD Minerals
  • Source Rock Minerals, LP
  • Triumph Resources Corporation
  • Second Chance Royalties, LLC
  • Rexco, Inc.
  • OG Info, LLC
  • SGRC Insurance
  • TBF Financial, LLC
  • TitleX.com, LLC
  • Intertech Flooring
  • Pavecon, Inc.
  • Corpus Christi Housing Authority
  • Durrill Properties
  • Gourley Contractors, LLC
  • Screened Up Oilfield Services, LLC
  • Petro-Chem Refrigeration, Inc.

Professional Associations and Memberships

  • Corpus Christi Bar Association, Member
  • Corpus Christi Bar Association, Bar Referral Service Section, Former Chairman
  • Texas Association of Defense Counsel
  • Defense Research Institute
  • State Bar of Texas - Member of Construction Law section
  • State Bar of Texas - Member of Litigation section
  • State Bar of Texas - Member of Oil, Gas & Energy Resources section
  • State Bar of Texas, Appellate Law Section

Past Employment Positions

  • Vinson & Elkins, LLP, Briefing Clerk, January 3, 1990 - December 31, 1993
  • Shaw, Robertson & Anschutz / Shaw & Associates, Associate, January 8, 1994 - August 10, 1999
  • O'Quinn, Laminack & Pirtle, LLP, Complex Tort Litigation, March 3, 2002 - September 1, 2004
  • McLallen, Phillips & Langenfeld, PLLC, Managing Partner, 2000 - 2010

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