"Aggressive Representation for Honest People"

                   Denver  |  Summit County


36 Steele Street, Suite 200
Denver, CO 80206

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Marijuana Business Attorney

Sean McAllister is a leading marijuana industry attorney in Colorado. Mr. McAllister helped draft Amendment 64 and he has represented hundreds of dispensaries and marijuana companies since 2009. The McAllister Law Office represents some of the leading marijuana companies in Colorado and is a full service business law firm for the marijuana industry.

It is essential in this highly regulated industry that companies have strong articles of incorporation, operating agreements, promissory notes with investors, management agreements with key employees, and contracts with vendors.

  • Business matters involving the Colorado Marijuana Laws - Amendment 64
  • Medical marijuana criminal & civil Attorney
  • Marijuana product representation attorney

Marijuana business attorney Sean Mcallister

Moreover, McAllister Law Office is pioneering strategies to take marijuana companies national, working on creating public companies to expand into the more than 20 states that currently allow medical or recreational marijuana. Finally, the Firm specializes in defending dispensaries in state enforcement actions based on alleged rules violations, with numerous successful outcomes to its credit.

Criminal Defense Law Firm

Attorney You have been charged with a crime in Colorado and your future hangs in the balance. You need knowledge, strength, experience, and confidence on your side. Clients of Denver Attorney Sean McAllister trust him and his law firm to protect their rights in both felonies and misdemeanors in both state and federal court.

  • Felony and misdemeanor criminal defense
  • Drug possession and distribution charges
  • DUI - DWAI criminal defense attorney

Denver criminal attorney lawyer Sean Mcallister


Mr. McAllister has over 14 years of experience as a criminal lawyer with extensive trial and pre-trial litigation to his credit. His trial victories include wins in vehicular homicide, marijuana cultivation, felony drug possession, felony assault, DUI, domestic violence, and business civil litigation cases. While the McAllister Law Office is best known for its work on high profile drug cases, it also represents regular people on simple misdemeanor, DUI, domestic violence, and theft cases. Sean McAllister is one of the state's leading experts on drugged driving, including driving under the influence of marijuana or prescription drugs and one of Sean's cases led to the firing of the state toxicology and the shutdown of the state testing lab.

Civil Litigation Lawyer

Attorney McAllister Law Office also specializes in civil litigation, with a particular focus on marijuana related civil suits. Civil litigation is a complicated process and you need experienced counsel on your side. McAllister Law Office has major trial victories in civil cases, including cases involving breach of contract, civil theft, and other civil claims. In addition, McAllister Law Office prides itself on seeking reasonable and fair settlements to avoid the expense and time of a full trial. The Firm has settled numerous cases with outcomes satisfactory to clients.

Located across from the
Cherry Creek Shopping Center

McAllister Law Office Denver Colorado

Mr. McAllister's practice is expanding to serve his clients throughout the state of Colorado.



Sean T. McAllister is one of Colorado’s leading drug policy reform lawyers. His practice focuses on marijuana business issues, criminal defense, and DUI.


Learn more about Mr. McAllister and the firm
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