Kieran Ringgenberg specializes in Litigation, California Cannabis Legalization & Industry, Commercial Transaction, and Intellectual Property. Ringgenberg Law Firm provides legal representation and is driven by the values of excellence and integrity.

Cannabis Business Attorney

Cannabis Licensing, Business Transactions, and Regulatory Advice

Ringgenberg Law Firm PC | California Legalized | Kieran Ringgenberg is based in Oakland, CA and specializes in Litigation, California Cannabis Legalization & Industry, Commercial Transaction, and Intellectual Property | TITLE BANNER.jpeg

Kieran Ringgenberg advises clients on the complex and rapidly changing requirements to obtain state and local licenses to operate in the cannabis industry, and how to stay abreast of, and comply with, the emerging regulatory regime.



Cannabis Business Attorney

The goal of this cannabis industry practice is to further California's leadership as a model for responsible operation, guided by effective licensing and regulation. How well California's industry adapts to the Medical Cannabis Regulation and Safety Act and Proposition 64 (the Adult Use of Marijuana Act) will play an important role in determining how fast, and how smoothly, the nation and the world leave behind the pernicious drug war model.

Kieran represents cannabis industry entrepreneurs, established companies, and investors on a full range of legal services relating to litigationcommercial agreements, and intellectual property. Core to all of this work is an understanding of how business structures and operations affect eligibility for licensing and regulatory compliance, and the unique needs of the cannabis industry given the governing legal structure.


  • Strategies to obtain and maintain local (city or county) and state licenses for dispensaries, cultivators, distributors, manufacturers, and testing labs;

  • Providing up-to-date information on rapidly-changing municipal codes, state legislation, and the MCRSA and Proposition 64 (Adult Use of Marijuana Act) regulations being drafted by the Bureau of Medical Cannabis Regulation, the Department of Food and Agriculture, and the Department of Public Health; and

  • Structuring businesses to maximize licensing opportunities and achieve optimum tax-efficiency, particularly in light of the unique burdens imposed by Internal Revenue Code Section 280E.



As part of our mission, the firm presents to industry groups to help entrepreneurs understand the changing regulatory landscape. As one example, Kieran recently appeared on Gateway Incubator's Open Office Hours.



California Legalized is a comprehensive asset to cannabis businesses. Through this info blog, Kieran provides continual news, insights, and legal analysis for the changing cannabis industry. View all posts here. →

Topics including:

@CaliLegalized (Twitter) provides regular updates and carefully curated news for the cannabis industry and updates from Kieran's legal blog.



On April 22, 2017, Kieran will present on commercial real estate issues in the cannabis industry at the California Bar Association's Real Property Retreat in Napa, California.  Register here.