L. Mark Walker

L. Mark Walker


Crowe & Dunlevy

Recognized since 2003

Oklahoma City, Oklahoma

Practice Areas

CleanTech Law

Energy Law

Energy Regulatory Law

Environmental Law

Litigation - Environmental

Mass Tort Litigation / Class Actions - Defendants

Natural Resources Law

Oil and Gas Law

Water Law

Lawyer of the Year Badge - 2021 - Environmental Law Lawyer of the Year Badge - 2020 - Energy Law Lawyer of the Year Badge - 2019 - Energy Regulatory Law Lawyer of the Year Badge - 2015 - Environmental Law
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L. Mark Walker, a director in Crowe & Dunlevy’s Oklahoma City office, focuses his practice in the areas of energy, natural resources and environmental law. His practice includes litigation in both federal and state courts, as well as practicing before the Oklahoma Water Resources Board, Oklahoma Department of Environmental Quality and Oklahoma Corporation Commission. Mark is listed by Chambers USA as a leading individual in Energy and Natural Resources, in addition to his rankings in Best Lawyers and Super Lawyers.*

An esteemed fellow in the American College of Environmental Lawyers, Mark has authored numerous energy, natural resource and environmental articles for publications such as the Oklahoma Bar Association’s Bar Journal, Oklahoma Law Review and Tulsa Law Review. He lectures at numerous conferences and seminars, including those sponsored by the American Bar Association and Oklahoma Bar Association. He is also a member of the Mineral Lawyers Society of Oklahoma City and serves on the regulatory and environmental committee of the Oklahoma Independent Producers Association.

Mark graduated with special distinction from the University of Oklahoma, where he completed his Bachelor of Business Administration in Economics in 1980. He obtained his Juris Doctor at the University of Oklahoma College of Law in 1983, where he was elected to the Order of the Coif. He has also served his community, helping with tornado disaster relief and legal services for the indigent.

Location

  • Braniff Building, Suite 100
    324 North Robinson Avenue
    Oklahoma City, OK 73102

Crowe & Dunlevy
Headquarters: Oklahoma City, Oklahoma

77 The Best Lawyers in America® awards

13 Best Lawyers: Ones to Watch in America awards

Best Law Firms Badge Full Firm Profile

Lawyer of the Year Badge - 2021 - Environmental Law Lawyer of the Year Badge - 2020 - Energy Law Lawyer of the Year Badge - 2019 - Energy Regulatory Law Lawyer of the Year Badge - 2015 - Environmental Law

Named "Lawyer of the Year" by Best Lawyers® for:

  • Environmental Law, Oklahoma City (2021)
  • Energy Law, Oklahoma City (2020)
  • Energy Regulatory Law, Oklahoma City (2019)
  • Environmental Law, Oklahoma City (2015)

Recognized in The Best Lawyers in America® 2023 for work in:

  • Energy Law
  • Energy Regulatory Law
  • Oil and Gas Law
  • Environmental Law
  • Litigation - Environmental
  • Natural Resources Law
  • Water Law
  • CleanTech Law
  • Mass Tort Litigation / Class Actions - Defendants

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