Cynthia Castillo represents clients in a wide range of complex litigation matters, including contract disputes, fraud and tort litigation, and consumer class actions. She has experience with all phases of litigation, including achieving early resolutions of disputes through pre-litigation negotiations, drafting dispositive motions, managing complex e-discovery, and representing clients at trial. Cynthia is the co-chair of Farella’s Cannabis Litigation Initiative, and she has experience in representing clients in disputes relating to the cannabis industry.

Her experience includes:

  • Successfully defending a private equity management firm at trial in an employment and breach of contract suit brought by one of its former officers;
  • Representing a cannabis technology company in a putative Telephone Consumer Protection Act class action; 
  • Representing a major technology company in a consumer class action; 
  • Representing a private equity firm in a fraud case; 
  • Defending a major energy company in a fraud action, in which the court granted the company’s motion to compel arbitration; and
  • Representing a major cancer services provider and its affiliates in their Chapter 11 bankruptcy cases, which included obtaining a favorable settlement related to potential liability for a consumer data breach.

Cynthia maintains an active pro bono practice, which has included assisting a victim of domestic violence from Honduras to obtain asylum in the United States.

Cynthia served as a law clerk for the Honorable Philip Martinez of the United States District Court for the Western District of Texas. Before attending law school, she taught 4th and 6th grade with Teach for America.

Memberships and Affiliations

  • Member, Edward J. McFetridge American Inn of Court (2021)
  • Board of Directors, San Francisco La Raza Lawyers Association; co-chair Latina Committee, which serves as a network for Latina lawyers practicing in the Bay Area.

Firm Highlights


Complying With the TCPA After the Facebook Supreme Court Decision

Many cannabis dispensaries rely heavily on text messaging marketing programs to reach their customers and to create loyalty in an increasingly competitive market. While text messaging programs may be an effective marketing tool, they...

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Cannabis Disputes: How to Minimize Your Litigation Risks

Farella's Cannabis Industry Education Series features Tony Schoenberg and Cynthia Castillo discussing "Cannabis Disputes: How to Minimize Your Litigation Risks." The laws regulating the cannabis industry are quickly changing and evolving. Many disputes are a...

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New Restrictions on Sales and Delivery of E-Cigarettes and Vaping Products

The Preventing Online Sales of E-Cigarettes to Children Act substantially and materially alters how companies sell and ship e-cigarettes and tobacco and cannabis vaping products and components.  The act was signed into law on...

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Alternatives to Bankruptcy in the Cannabis Sector

Recreational or medicinal cannabis is now legal in 35 states and the District of Columbia. But cannabis is still a  Schedule I controlled substance  under the federal Controlled Substances Act, which presents a host...

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California Cannabis Businesses Face Costly Peril With Marketing Robocalls, Attorney Says

Cynthia Castillo spoke at the 2021 North Coast Cannabis Conference underwritten by Farella Braun + Martel and presented by the North Bay Business Journal. Cynthia spoke on trends in Telephone Consumer Protection Act (TCPA...

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