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Cornelius M. Hayes III

Cornelius M. Hayes III

Corpus Christi, Texas

Neil knew as a young boy he wanted to be a lawyer, and his diverse practice keeps him enthused. Besides title work and other oil and gas related matters*, Neil represents and participates in various religious groups. On the one hand, he says he is helping produce petroleum products that benefit our country. On the other hand, he is representing religious organizations which he believes also improve our society. Neil holds a Bachelor of Arts Degree in English from the University of Texas and a Juris Doctorate Degree from Texas Tech University School of Law. Neil is licensed to practice in Texas, North Dakota, Oklahoma, Pennsylvania, and the United States District Court, Southern District of Texas. He is a member of the State Bar College and the AAPL, Corpus Christi, Houston, San Antonio and Permian Basin Associations of Professional Landmen.

Neil and his wife, Marcy, have four sons and attend the Corpus Christi Cathedral. He enjoys scouting, fishing and hunting. He is active in the community by having sat on the Board of Directors and Executive Committee - Boy Scouts of America - Gulf Coast Council and sitting on the Board of Directors - Fullness of Truth Ministries; Finance Committee - Corpus Christi Cathedral and many other community organizations.


Areas of Practice

  • Oil, Gas & Mineral Law
  • Uranium

Litigation Percentage

  • 10% of Practice Devoted to Litigation

Certified Legal Specialties

  • Board Certified, Oil, Gas & Mineral Law, Texas Board of Legal Specialization, 1995 to present

Bar Admissions

  • Texas, 1980
  • North Dakota, 2012
  • U.S. District Court Southern District of Texas, 1981
  • Oklahoma, 2014
  • Pennsylvania, 2015


  • Texas Tech University School of Law, Lubbock, Texas
    • J.D.
  • University of Texas, Austin
    • B.A.
    • Major: English

Representative Clients

  • Suemaur Exploration & Production LLC
  • Newfield Exploration Company
  • EP Energy – E&P Company, L.P. (Formerly El Paso Production Company)
  • XTO Energy Inc.
  • Statoil North American, Inc.
  • Petro Harvester Oil & Gas, LLC
  • ConocoPhillips Company
  • Esenjay Petroleum Corporation
  • Hilcorp Energy Company
  • Virtex Petroleum Company, Inc.


  • Frost National Bank
  • American Bank, N.A.


  • Recent Changes in Oil & Gas Law 1998 & 2003, CCAPL

Professional Associations and Memberships

  • Board Certified Oil, Gas and Mineral Law – Texas Board of Legal Specialization, 1995 - Present
  • State Bar of Texas – Oil, Gas and Mineral Law, 1980 - Present
  • State Bar of North Dakota – Oil, Gas and Mineral Law , 2012 - Present
  • State Bar of Oklahoma – Oil, Gas and Mineral Law , 2014 - Present
  • State Bar of Pennsylvania – Oil, Gas and Mineral Law, 2015
  • The Corpus Christi Bar Association – Section on Natural Resources Law, 1980 - Present
  • Member of the State Bar College, 1996 - Present
  • Corpus Christi Association of Professional Landmen (CCAPL), 1980 - Present
  • American Association of Professional Landmen (AAPL), 1990 - Present
  • San Antonio Association of Professional Landmen (SAAPL), 1998 - Present
  • Houston Association of Professional Landmen (HAPL), 2003 - Present
  • Permian Basin Landman’s Association (PBLA) , 2014 - Present

Past Employment Positions

  • Porter Rogers Dahlman & Gordon, P.C, Attorney, 1980 - Present

Pro Bono Activities

  • Board of Directors and Executive Committee - Boy Scouts of America - Gulf Coast Council, 2005 - 2010
  • Board of Directors - Fullness of Truth Catholic Evangelization Ministries, 2004 - Present
  • Stewardship Council - Diocese of Corpus Christi, 2003 - 2006
  • Finance Council - Corpus Christi Cathedral, 2003 - Present

With offices in Corpus Christi, Austin, and San Antonio, the law firm of Porter, Rogers, Dahlman & Gordon, P.C., serves South Texas, Central Texas, and the Rio Grande Valley. We have many clients in Atascosa, Bastrop, Bexar, Brooks, Burnett, Cameron, Comal, Duval, Gillespie, Hays, Hidalgo, Jim Wells, Kendall, Live Oak, Nueces, Port Aransas, San Patricio, Starr, Travis, Uvalde, Webb, Williamson, and Wilson counties, including the communities of Alice, Brownsville, Del Rio, Edinburg, Fulton, Harlingen, Laredo, McAllen, Rockport, and San Diego.

One Law Firm in Three Cities

Corpus Christi




San Antonio


Porter, Rogers, Dahlman
& Gordon, P.C.

One Shoreline Plaza,
800 North Shoreline
Suite 800 S
Corpus Christi TX 78401
Phone 361-880-5808
Fax 361-880-5844
E-Mail the Firm

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