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Born and raised in Wyoming, Mr. Larson understands that when you need legal representation in Wyoming, it should be done the Wyoming way. Diligent, determined, and driven, Mr. Larson strives to efficiently and effectively provide reasonable and rational counsel in your time of need.

Mr. Larson’s growing practice is focused on civil litigation, including the arenas of contract, business and corporate, natural resources, personal injury, product liability, administrative, trade secrets, sports, probate, construction, real estate, employment, and public health law.

Professional Background

Mr. Larson attended college and played football at the University of Mary in Bismarck, North Dakota. After graduating then working for two years, Mr. Larson attended law school in Minnesota for one year before circling the wagons back to Wyoming for his final two years of law school. After graduating law school in 2013, Mr. Larson moved to Cheyenne to serve as law clerk to the Honorable Steven K. Sharpe of the First Judicial District Court of Wyoming. At the end of his two-year term, Mr. Larson served as law clerk to the Honorable Alan B. Johnson of the United States District Court of Wyoming for one year. In 2016, Mr. Larson joined Hathaway & Kunz, LLP as an associate.

Mr. Larson experienced numerous areas of both state and federal law while serving as a law clerk, experiencing cases concerning guardianships and conservatorships, probate, personal injury, product liability, business and corporate, trusts, estates, natural resources, contracts, administrative process, appellate process, workers’ compensation, criminal and domestic.

In addition to his courthouse experience, Mr. Larson is a published legal writer who focuses on representing his clients through concise and precise written and oral advocacy.

Personal Interests

Outside of work, Mr. Larson enjoys running, weight training, sports, reading, writing, and most of all, his family.

9.9 Sean Michael Larson

Practice Areas

  • Civil Litigation
  • Contract Law
  • Business & Corporate Law
  • Energy, Environment & Natural Resources Law including Public Lands
  • Personal Injury & Product Liability
  • Administrative Law
  • Sports Law
  • Probate Law
  • Construction & Real Estate Law
  • Employment Law
  • Public Health Law
  • Trade Secrets and Other Misappropriation of Proprietary Business Information

Related Employment

  • Law Clerk, U.S. District Court for the District of Wyoming, 2015-2016
  • Law Clerk, First Judicial District, State of Wyoming, 2013-2015
  • Extern, Wyoming Supreme Court, 2013
  • Seasonal Associate, Sherard, Sherard, Artery & Johnson, Wheatland, Wyoming, 2012-2013
  • Seasonal Associate, Lubing & Corrigan, Jackson, Wyoming 2012
  • Volunteer Research Assistant, Public Health Law Center, Saint Paul, Minnesota, 2011

Professional Leadership & Community Involvement

  • The American Inns of Court
    • Member, Tenth Circuit Advisory Committee, 2016-2017 Member, The Ewing T. Kerr American Inn of Court, Cheyenne, Wyoming, 2013-Current
      • Secretary, 2015-2017
    • Representative, 2015 Celebration of Excellence, Washington, D.C.
  • American Bar Association, 2013-Current
    • Member, Section of Litigation
    • Member, Section of Environment, Energy, and Resources
      • Member, Public Land and Resources Committee
        • Vice-Chair of Electronic Communications, 2015-2018
        • Vice-Chair of Social Media, 2015-2018
        • Vice-Chair of Programming, 2018-Current
  • Federal Bar Section of the Wyoming State Bar
    • Chair, 2017-2018
    • Past Chair, 2018-2019
    • Council Member, 2017-Current
  • Wyoming Trial Lawyers Association, 2013-Current
  • Wyoming Law Review
    • Senior Staff and Comment Author 2012-2013
    • Article Author, 2016
  • SCORE Volunteer, Cheyenne Chapter
    • 2018-Current
  • National Institute of Justice & RAND Corporation, Workshop on Challenges with Digital Evidence Held in Remote Datacenters, Washington, D.C.
    • Workshop Contributor, May 2017
  • National Academy of Personal Injury Attorneys, Top 10 Under 40 in Wyoming, 2017



  • J.D., University of Wyoming College of Law, Laramie, Wyoming, 2013
  • Order of the Coif
    • Natural Resource Law Club, University of Wyoming College of Law, 2011-2013
      • President, 2012-2013 and Treasurer, 2011-2012
  • B.S., English, University of Mary, Bismarck, North Dakota, 2008
    • Magna Cum Laude
    • NAIA/NCAA Division II Football, 2004-2008
      • 2007 All-Academic Team, Northern Sun Intercollegiate Conference
      • Wide Receiver & Special Teams
      • October 27, 2007 Special Teams Player of the Week

Bar Admissions

  • Wyoming State Bar, 2013-Current

Court Admissions

  • Wyoming Supreme Court
  • U.S. District Court for the District of Wyoming