David E. Pepper, Partner

Phone: (405) 235.7000
Fax: (405) 996.3403
E-Mail: dpepper@hartzoglaw.com

Practice Areas

  • Oil and Gas Law (including regulatory)
  • Litigation

Professional Biography

  • David has extensive experience in most areas of oil and gas law including regulatory, litigation, and contract matters
  • He is a frequent lecturer for The Southwest Legal Foundation and the Oklahoma Bar Association on oil and gas issues
  • Oklahoma Mineral Lawyers Association
  • Recognized in Best Lawyers in America in the areas of: 
         Natural Resources Law
         Oil & Gas Law 
  • Listed in Chambers USA Guide to America’s Leading Lawyers
  • Listed one of Oklahoma Super Lawyers in Energy & Natural Resources Law

Bar Memberships

  • Oklahoma Bar Association
  • American Bar Association
  • Admitted to practice in state courts of Oklahoma, United States District Courts for the Western, Northern, and Eastern Districts of Oklahoma, and the Tenth Circuit Court of Appeals


  • University of Oklahoma (B.B.A. 1972)
  • Oklahoma City University (Juris Doctor 1975)


  • Board Member, Prevent Blindness of Oklahoma
  • Board Member, American Heart Association


  • Wife, Leslie and three children

Published Opinions

  • Comanche Resources vs. Turner, 33 P.3d 688
  • Lamments vs. Oklahoma Corporation Commission, Okla. Civil Appeal Div.
  • Davis vs. Sonat Exploration, 951 F. Supp. 186
  • El Paso Production Co. vs. Oklahoma Corporation Commission, 868 P.2d 1320
  • Zilka Energy vs. Loighton, 920 F.2d 1520
  • SKZ, Inc. vs. Petty, 782 P.2d 939
  • Bixler vs. Lamar Exploration, 733 P.2d 410