David is a member of Butler Snow’s litigation department and practices within the Tort, Transportation, & Specialized Litigation Group.

Biography – View PDF Bio


Bar Admissions

  • Colorado, 1985
  • Minnesota, 1987 (Inactive)
  • U.S. District Courts
    • Colorado: District of Colorado
  • U.S. Court of Appeals
    • 10th Circuit

Civic Involvement

  • Boomer Esiason Cystic Fibrosis Foundation


  • Martindale-Hubbell®
    • AV®– PreeminentPeer Review Rated
  • Best Lawyers in America®
    • Lawyer of the Year, Personal Injury Litigation – Defendants (Denver), 2020
    • Construction Law, 2021-2022
    • Mass Tort Litigation / Class Actions – Defendants, 2015-2022
    • Personal Injury Litigation – Defendants, 2020-2022
  • Super Lawyers®
    • Colorado Super Lawyers, Personal Injury – Products: Defense, 2008-2021
  • Law Week Colorado, Top Litigators 2020

Education & Honors

  • University of Iowa School of Law, J.D., with honors, 1985
  • University of Iowa, B.S., Political Science and Economics, 1982
    • Four-year Letterman, Varsity Football/Starter, 1982 Rose Bowl Team, Big Ten All-Academic Football Team, 1980-1981


  • David Gregory Mayhan has been practicing law since 1985, having earned his Juris Doctor, with honors, from the University of Iowa School of Law. His practice is concentrated in commercial litigation, construction law, insurance, personal injury and product liability defense.  He previously served as a partner in a Denver boutique litigation firm, and prior to that, was a senior attorney for a Fortune 500 insurance company where his responsibilities included litigation and supervising outside counsel in litigation. He served as a board member of the Colorado Defense Lawyers Association (CDLA) from 2014 to 2016, and chaired the 2016 CDLA Trial Academy.  He carries an AV-Preeminent rating from Martindale-Hubbell and is listed in Colorado’s Super Lawyers and Best Lawyers.
  • Achieved defense verdicts in construction, personal injury, and commercial law trials and arbitrations.
  • Lead trial counsel in defense verdict for municipality in U.S. District Court trial in Denver in which Plaintiff claimed in excess of $7 million in damages.
  • Lead trial counsel in Denver District Court jury trial where contractor client deemed prevailing party in lawsuit by homeowner’s association seeking over $3.5 million in alleged construction defects.
  • Prosecuted counterclaims related to construction defects in major utilities installation; hired 90 days before arbitration for large residential real estate development.
  • Obtained summary judgment for third-party defendant in large, complex construction defect claims involving approximately $40 million in alleged repair costs and other damages.
  • Member of trial team defending products supplier facing over $50 million in claims; obtained favorable verdict after six-week trial in United States District Court, District of Colorado.
  • Successful defense of contractor involved in commercial disputes concerning zoning and construction related to commercial warehouse/office building.
  • Member of trial team defending former fraternity president in high-profile wrongful death claim arising from hazing incident at the University of Colorado.
  • More...

Papers, Presentations, & Publications

  • Panel Moderator, “Designing and Constructing Denver as a Placemaking Hub,” Bisnow Denver State of the Market, June 26, 2019. 
  • Speaker, “Your Guide to Legal Matters,” Business Leaders Podcast, May 25, 2019.
  • Co Author, “Surge in Apartment Construction Fuels Condo Conversions, Liability Concerns in Denver,” Law Week Colorado, Vol. 15, No. 43, October 22, 2018.
  • ​Panelist and Speaker at National Business Institute Seminar, Firearms Law in Colorado – A Guide to Regulatory and Liability Concerns for Buying, Selling or Owning Firearms, Denver and Colorado Springs, CO, December 7, 11, 2017.
  • Mayhan, D. and Baumann, S., “Technology in the Courtroom”, Chapter 23 of the Colorado Courtroom Handbook for Civil Trials, Fourth Ed. (Continuing Legal Education in Colo., Inc., for the Colorado and Denver Bar Associations)
  • Co-Director, Colorado Defense Lawyer’s Association “Boot Camp” for Young Lawyers, June 23, 2017
  • “Come Join the 21st Century: Latest Trial Software Programs”, presented at the Colorado Defense Lawyers Annual Meeting, Santa Fe, NM, July 28, 2017
  • Director, Colorado Defense Lawyers Association Annual Trial Academy, April 20-22, 2016, Denver, CO
  • “Trial Success Stories: What Does and Does Not Work”, presented at the Colorado Defense Lawyers Annual Meeting, Beaver Creek, CO, August 2, 2013
  • More...