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Mark was born and raised in Casper, and grew up with strong ties to Cheyenne, spending much time here visiting his grandparents. He grew up hunting and fishing Wyoming and is passionate about elk hunting in Wyoming to this day. He graduated from Natrona County High School in 1996, and then from the University of Wyoming at Casper College with a bachelor’s degree in criminal justice in 2001. He began a career as a Wyoming Peace Officer with the Wheatland Police Department in 2000. After a few years there, he moved to Sheridan and served two years as a Deputy Sheriff. He finished his law enforcement career after moving to Cheyenne with his wife, Rachel, where he finished out a 20-year career as a Deputy Sheriff.
By the time Mark retired from law enforcement in 2020, he had experienced a revelation that he would be better able to serve people and uphold the Wyoming and United States Constitutions if he attended law school. He is passionate about ensuring that people’s rights are protected and can use his past experience to effectively represent people accused of a crime.
He graduated from the University of Wyoming, College of Law with his Juris Doctorate with Honor in 2023. While at law school, Mark worked in the Defender Aid Clinic where he learned how to become a criminal defense attorney. He also completed an externship, working for Chief Justice Fox of the Wyoming Supreme Court in his third year of law school, where he learned a great deal about the law from the finest legal minds in Wyoming.
Mark married the love of his life, Rachel, in 2003, and they have four wonderful daughters. Mark enjoys teaching his daughters to hunt elk and loves camping with his family. He can also be found at a wide variety of his daughter’s extracurricular activities, such as softball, marching band performances, basketball, and music recitals.
Mark looks forward to helping you with your legal problems, including criminal defense, family law, property evictions, estate planning, and probate. He is honored to serve you as your attorney and will always treat you with respect and the individual attention you deserve!
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Chat withState: Nebraska
Acquired: 2025
No misconduct found
State: Colorado
Acquired: 2025
No misconduct found
State: Wyoming
Acquired: 2023
No misconduct found
1920 Thomes Ave., Ste. 600, Cheyenne, WY, 82001
1 Client Review
Showing 1 - 1 of 1 review
Posted by Bernard | June 15, 2024 | Hired Attorney
The Absolute best
Mark Yocum Was an absolute godsent for my family, He is one of the best lawyers I’ve ever had represent me, Very diligent in his field very knowledgeable when it comes to the law and how it will pertain to your case, he does his research and cares for the people that he represents. If you decide to p...
"Mark does a fantastic job understanding the law, helping his clients understand their rights, and protecting those rights through the court process."
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2025 - Present
Associate, Patton & Davison LLC
2023 - 2025
Associate Attorney, Olsen Legal Group, LLC
2023 - 2023
Extern, Wyoming Supreme Court - Chief Justice Fox
2005 - 2020
Deputy Sheriff, Laramie County Sheriff's Office
2003 - 2005
Deputy Sheriff, Sheridan County Sheriff's Office
2000 - 2003
Police Officer, Wheatland Police Department
2023 - Present
Wyoming Trial Lawyers AssociationMember
2023
JD - Juris Doctor
2001
BA - Bachelor of Arts
English