Mark R. Ruppert - Holland & Hart LLP

Mark R. Ruppert

Listed in Best Lawyers since 2013
Phone: 307-778-4267

With significant experience in environmental and natural resources law, energy companies engage Mr. Ruppert when faced with high-stakes disputes. He employs his years of trial advocacy experience to bring his clients' cases to favorable resolution. He has a successful track record of trying or economically settling energy company cases to achieve positive business results for his clients.

Mr. Ruppert's practice centers on complex environmental and commercial litigation for oil and gas companies, pipelines, refineries, and power plants. As lead counsel, he has handled matters involving the federal False Claims Act, royalty underpayment and reporting, class actions, surface access and subsurface disturbance, air and water permit appeals, environmental and Nuclear Regulatory Commission notices of violation, and patent infringement in federal and state courts and before federal and state agencies.

He has litigated and tried more than 200 criminal cases, more than half with juries. He is a retired Colonel in the Air Force JAG Corps, where he had a distinguished career as a judge, prosecutor, and civil litigator. As a criminal trial judge, he presided over 80 trials requiring rulings and findings on complex Constitutional procedure and federal evidentiary issues. All of his decisions were affirmed at the appellate level.

Mr. Ruppert has extensive experience advising senior military leaders and civilian business managers on mission-impacting aspects of civil litigation, environmental law, federal labor law and criminal litigation. In 2004, the Secretary of Defense appointed Mr. Ruppert as a team leader to conduct an investigation under combat conditions on prisoner interrogations in Afghanistan.

Mr. Ruppert was the chief environmental counsel for Air Force Space Command's worldwide mission, where he successfully resolved or prevailed in numerous disputes with federal EPA and state environmental regulators in Wyoming, Colorado, California, and Florida. He is licensed to practice before Colorado and Wyoming courts.

University of CincinnatiBA 1978The Ohio State UniversityJ.D. 1981George Washington University Law SchoolLL.M 1995
Federal Bar AssociationEnvironmental/E&P and Public Lands Committees of the Petroleum Association of WyomingLitigation and Natural Resources Section of ABABoard of Directors, Cheyenne Chamber of Commerce

Office Location

2515 Warren Avenue, Suite 450
Cheyenne, WY 82001-3162
United States

Practice Areas

Environmental Law
Litigation - Environmental