Keenan represents businesses of all sizes in litigation matters, corporate formation, business development, and protection of intellectual property rights. Since 2017, he has focused his practice on assisting companies operating in the regulated cannabis space, including hemp, marijuana, and ancillary endeavors.

Before joining Frantz Ward, Keenan co-founded Foster & Jones and worked at the Hoban Law Group. In both roles, he guided businesses in the emerging cannabis industry. Keenan also teaches political science courses at Heidelberg University as an adjunct professor and serves as counsel and an ex-officio member of the board of directors of Model United Nations of the Far West, a not-for-profit organization that hosts an annual, collegiate model United Nations conference, where students can hone their oratory and international diplomacy skills. Keenan lives in Hudson with his wife Regan and daughters Maisie and Aida.


    • Obtained federal trademark protection for non-plant products for hemp and marijuana businesses.
    • Successfully obtained a settlement payment for a landlord of a defaulting marijuana tenant in receivership.
    • Along with co-counsel, successfully obtained a preliminary injunction against a municipality preventing the enforcement of an unconstitutional ordinance.
    • Assisted multiple Colorado marijuana applicants during state and local application processes, including initial applications, annual renewals, change of ownership, change of location, and modification of premises.
  • Education

    • University of Denver Sturm College of Law, J.D., Order of St. Ives, 2012
    • Heidelberg University, B.A., summa cum laude, 2009


    • State of Colorado
    • State of Indiana
    • State of Ohio
  • Professional Affiliations

    • Midwest Hemp Council - Member (2019-2022)
    • Colorado Bar Association - Member
    • Indiana State Bar Association - Member
    • Ohio State Bar Association - Member

    Community Involvement

    • Heidelberg University - Adjunct Professor of Political Science
    • Model United Nations of the Far West - Counsel (Ex-Officio Board Member)
    • Colorado Bar Association CLE, A Growing Industry: The Future of Hemp and CBD, Denver, CO (Apr. 18, 2017)
    • Cannabis in Veterinary Medicine Symposium, Legal Status Update & Considerations, Lone Tree, CO (Oct. 6, 2018)