Catherine M. Mercer

Catherine M. Mercer is an associate at Hirst Applegate, LLP in Cheyenne, Wyoming. She joined the firm in 2025 and practices in civil litigation, employment law, commercial litigation, personal injury litigation, products liability, and real estate. Her background in appellate government work and judicial service provides a strong foundation for analyzing legal issues, preparing written arguments, and handling disputes that may move through trial and appellate courts.

Mercer earned a J.D. from the University of Wyoming in 2019 and a B.A. in Psychology with a minor in Business from the University of Wyoming in 2016. Her education developed both legal analysis and an understanding of human and organizational behavior. That combination supports work in employment, personal injury, commercial, and real estate disputes where legal rules often intersect with workplace decisions, business relationships, and contested factual records.

Mercer served as an Assistant Attorney General in the Wyoming Attorney General’s Criminal Appellate Division from 2019 to 2022. She then worked as a staff attorney for Judge Joshua Eames of Wyoming’s Seventh Judicial District Court from 2022 to 2024 and as a term clerk for U.S. Magistrate Judge Scott P. Klosteman in the District of Wyoming from 2024 to 2025. Her profile lists numerous reported Wyoming appellate cases from her government service.

Catherine M. Mercer is affiliated with the Wyoming State Bar Association and the U.S. District Court for the District of Wyoming, including service connected to the bar’s federal section. Her progression from appellate advocacy to state and federal judicial roles and then private practice gives her experience with legal writing, judicial decision making, and litigation procedure that supports clients facing complex civil and commercial disputes.

Law Office Affiliations

• Attorney, Hirst Applegate, LLP
• Federal Bar Section Counsel, Wyoming State Bar
• Member, United States District Court for the District of Wyoming

Licensed State

• Wyoming

Education

• University of Wyoming
  Juris Doctor (JD)
• University of Wyoming
  B.A. (Psychology, Minor, Business)

Awards & Badges