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Mark’s 26 years of experience, dedication, passion, and agility are reflected in his client satisfaction and sparkling reviews. As a former member of the U.S. military, Mark utilizes his skill and discipline to provide a systematic and intuitive approach in every case. Mark's unique background gives him an edge in offering genuine and satisfactory results.


After high school, Mark enlisted in the United States Army as a Military Policeman. Following training, Mark was sent to New York City, where he served as a Protective Service Agent for the Department of Defense, providing security to high-ranking Department of Defense officials and foreign guests. Mark was awarded an active duty ROTC scholarship and was commissioned a 2nd Lieutenant in the United States Army.  Mark served as a Air Defense Artillery officer before heading to law school.


After completing the environmental law program at George Washington University, Mark began his service as a Captain in the United States Air Force. In January of 1998, Mark became an Area Defense Counsel for the Eastern Circuit of the United States, defending over 40 criminal trials at Air Force bases throughout the eastern United States and Panama. After relocating to Hanscom Air Force Base in Boston, Massachusetts, Mark served as the Chief of Environmental Law, primarily negotiating Federal Facility Agreements with the EPA. In addition, Mark served as Special Assistant United States Attorney and the Deputy Staff Judge Advocate. 


In March of 2001, Mark joined a large national law firm responsible for litigating several complex commercial and business litigation matters. Amid COVID-19, Mark reunited with his former colleague, G. Stephen Long in 2020 to form GSL Trial Lawyers.


In 1988, Mark received an Army ROTC Scholarship and attended Colorado State University. In 1991, he graduated from Colorado State University and was commissioned a second lieutenant in the United States Army. Mark received his Doctor of Jurisprudence in 1995. He received a fellowship to study environmental law at The George Washington University Law School after graduation. After completing his LL.M in Environmental Law in 1996, Mark was admitted to the Colorado bar. In October 1996, Mark entered the United States Air Force as an Assistant Staff Judge Advocate (JAG). He served as Chief of Environmental and Civil Law and served as a Special Assistant United States Attorney.

Honors & Distinctions

  • 10 Best In Colorado Client Satisfaction, American Institute of Criminal Law Attorneys, 2016 

  • 10 Best, American Legal Institute, 2015 

Areas of Practice & Expertise 

  • Commercial contract disputes

  • Shareholder disputes

  • Real property disputes

  • Contract formation

  • Mediation

  • Arbitration

  • Criminal law (select cases)

Admitted to Practice Before

  • State of Colorado

  • United States District Court for the District of Colorado

  • United States Court of Appeals, 10th Circuit

Professional & Community Affiliations

  • Colorado Bar Association

  • Mentor, Denver Kids

  • Foster Parent, Animal Rescue of the Rockies


  • USAF, Environmental Law Conference, Federal Facility Agreements | 1997

Client Reviews

"Mr. Lukehart is simply THE BEST! I have a child with special needs and we have struggled with issues surrounding his care nearly the entire nine years of his little life. I was lost and had many questions, and frankly just tired of packing up and moving instead of facing the unlawful discrimination. Mr. Lukehart provided me with an immediate response and gave me comfort that there are good people out there willing to go that extra mile. Mr. Lukehart is all you will ever need in an attorney. Thank you for supporting us!"


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