Casey Terrell is a gritty problem solver. Although Casey maintains a broad civil practice, his primary areas of focus include energy litigation, commercial litigation, renewable energy development, carbon capture, and real property transactions.

Representing clients in State and Federal Courts, Casey is an experienced advocate, successfully managing cases for clients from beginning through appeal. Casey has experience working hand in hand with federal, state, and local administrative agencies to help his clients achieve their desired outcomes. He is thoughtful, building unique solutions for his client’s distinctive goals and circumstances. Casey excels in navigating the human element of the practice of law, collaborating with his clients to understand their interests and perspectives to better advocate for them.

Casey was named as an American Bar Association (ABA) On the Rise – Top 40 Young Lawyer in 2022. He currently serves on the Foundation for Natural Resources and Energy Law Young Professionals Committee as Vice-Chair and is involved in numerous organizations throughout the state of Wyoming. Casey has authored pieces for Wyoming Lawyer Magazine, the ABA TYL Magazine, and the Foundation for Natural Resources and Energy Law. Casey has presented across Wyoming and the Rocky Mountain region on a multitude of subjects ranging from nuclear reactors to carbon sequestration.

Practice Areas

    • Business Organizations
    • Litigation
    • Commercial Litigation
    • Mergers & Acquisitions
    • Renewable Energy
    • Permitting and Environmental
    • Title and Real Estate Related Matters
    • Oil and Gas
    • Mergers and Acquisitions
    • Environmental
    • Litigation
    • Lobbying, Regulatory and Administrative Affairs
    • Oil and Gas Conservation Commission
    • Title Examination
    • Pipelines, Transmission Lines and Other Linear Facilities
    • Real Estate
    • Access, Title and Property Disputes
    • Commercial Real Estate Acquisition, Sales and Leasing
    • Condominium and Homeowners’ Associations
    • Construction and Design
    • Development, Zoning and Land Use
    • Farm and Ranch Transactions
    • Real Estate Financing and Security Devices
    • Water Rights
    • Trusts & Estates
    • Probate, Estate and Trust Administration

Bar Admission

Wyoming- 2018
United States District Court, District of Wyoming- 2018
North Dakota- 2019
Montana- 2019


2018- J.D. with Honors, University of Wyoming College of Law
2018- M.A. Environment and Natural Resources, Haub School of Environment and Natural Resources at the University of Wyoming
2015- B.A. Political Science, University of Wyoming
2012- A.A. Music, Western Wyoming Community College

Prior Experience (Employment)

2015-2016 – LaBuda Law Office (Intern)
2017- Long, Reimer, Winegar, Beppler (Law Clerk)

Honors & Awards

2022- American Bar Association (ABA) On the Rise – Top 40 Young Lawyer
2022- The Sheridan Press “20 Under 40”
2017- Clarence A. Brimmer Scholar
2017- Salt Creek Energy Excellence Scholar
2017- Chiles and Evelyn Plummer Interdisciplinary Excellence Scholar
2017- Nick Theos Public Lands Council Scholar

Community Involvement

University of Wyoming College of Law Dean’s Advisory Board, Member
Salt Creek Energy Excellence Scholarship Selection Committee, Member
Wyoming Natural Resource Foundation, Board of Directors
Antelope Butte Foundation, Board of Directors, 2020-2023
Leadership Sheridan County Class Co-Chair, Class of 2020
Leadership Sheridan County Graduate, Class of 2019

Professional Affiliations

Foundation for Natural Resources and Energy Law Young Professionals Committee, Vice-Chair
Wyoming State Bar, Member
Wyoming State Bar, Environment and Natural Resources Section, Member, Past Chair (2021-2022)
Sheridan and Johnson County Bar Association, President (2018-2021)

Presentations & Publications

“Reconciling Conflicts Between Oil and Gas and Renewable Energy Development”- 2022 Presentation, Landscape Discussion on Energy Law & Policy in the Rockies.
“Carbon Capture and Sequestration in the Cowboy State: A Primer for the Wyoming Lawyer”- 2019 Webinar, Wyoming State Bar Energy & Natural Resources Section.
Kara H. Herrnstein, Karia A. Ruffin, Darin B. Scheer & Casey R. Terrell, “Resources from Above and Below: Reconciling Conflicts Between Renewable Energy Projects and Subsurface Mineral Development,” 68 Nat. Resources & Energy L. Inst. 6-1 (2022).
“Howdy, Neighbor! Navigating Co-Development of Energy Projects on Federal Lands”-June 2022 Wyoming Lawyer Magazine.
“Grit: The Difference Maker in Your Business and Life”-2022 Keynote Presentation, Sheridan County Chamber of Commerce Ignite Conference.
Kristina Mireles and Casey Terrell, “Extroverts and Introverts: Skills to Manage Success No Matter Your Personality Type”- Winter 2022 ABA TYL Magazine.
“Understanding Small Modular Nuclear Reactors and Their Regulation”- 2021 Panel Moderator, Landscape Discussion on Energy Law & Policy in the Rockies.
“Dividing Wyoming Farms and Ranches: Dividing the Property Without the Family Killing Each Other or Getting Killed on Taxes”-2021 Presentation, Wyoming State Bar Annual Meeting.
2021 Commencement Address-Western Wyoming Community College.
Pamela Garman and Casey Terrell, “Technology and Ethics: Tips for the Tech-Averse in Effectively Managing ESI in Federal Court”- Spring 2020 ABA TYL Magazine.
“Grit: How to develop what separates the best from the rest”-2020 Presentation, Legal Assistants of Wyoming Spring Seminar.
“Low-Carbon Energy Law & Policy: What Wyoming Lawyers Need to Know”- 2019 Presentation, Wyoming State Bar Annual Meeting.
“Potential Effects of the Proposed New Definition of Waters of the U.S. on Mining”- 2019 Presentation, National Meeting of the American Society of Mining and Reclamation.