Atty. Matthew Sean Harrison

Atty. Matthew Sean Harrison

Matthew Sean Harrison stands as a visionary leader in public policy innovation with over two decades of impactful contributions. In 2016, he played a pivotal role as a lead drafting attorney for California's Proposition 64, the groundbreaking initiative that decriminalized and regulated cannabis for adult use.

Aliso Viejo Aliso Viejo 11 yrs experience 11 year
Call (949) 541-4280 Book Appointment

Profile Summary

About Matthew Sean Harrison at a glance

Matthew Sean Harrison is a Member based in Aliso Viejo, California, practicing at Prometheus Civic Law. They have 11+ years of legal experience, licensed to practice since 2015. Their practice focuses on business, civil rights, and government. Admitted to practice in California United States District Court for the Southern District of California United States Distri (2015). Educated at University of Southern California Gould School of Law (J.D., 2010) and University of Miami (B.B.A. Political, 2005). Serands clients in Aliso Viejo, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Matthew Sean Harrison stands as a visionary leader in public policy innovation with over two decades of impactful contributions
  • In 2016, he played a pivotal role as a lead drafting attorney for California's Proposition 64, the groundbreaking initiative that decriminalized and regulated cannabis for adult use
  • Collaborating closely with then-Lt
  • Governor Gavin Newsom and other state leaders, Matthew was instrumental in authoring key provisions of the law, effectively weaving in best practices from industries such as sustainable agriculture and alcohol
  • Matthew brings a wealth of strategic expertise, accumulated over 10 years, in governmental affairs, complex policy, and public service
  • He advises a diverse spectrum of clients, including startups and technology companies, on business development, operational strategy, and regulatory compliance
  • Matthew's unparalleled blend of legal acumen and policy insight empowers organizations to navigate intricate regulatory landscapes, ensuring alignment with business objectives while fostering innovation
  • His commitment to transforming public policy frameworks positions him as an invaluable asset to any organization seeking to thrive within complex regulatory regimes, ultimately advancing sustainable, long-term growth

Practice Areas Explained

Matthew Sean Harrison's Areas of Practice

Each practice area below reflects the types of cases Matthew Sean Harrison handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Matthew Sean Harrison is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Civil Rights

Civil rights attorneys for discrimination, police misconduct, constitutional rights, and civil liberties cases.

Matthew Sean Harrison is one of 70,245 civil rights attorneys indexed nationally. Browse civil rights attorneys in California →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

Matthew Sean Harrison is one of 132,225 government attorneys indexed nationally. Browse government attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Aliso Viejo are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Aliso Viejo or all attorneys in California.

Frequently Asked

Common questions about Matthew Sean Harrison

Where is Matthew Sean Harrison's law office located?
Matthew Sean Harrison's law practice is located in Aliso Viejo, California. The firm is Prometheus Civic Law. You can contact the office directly through this profile page.
What practice areas does Matthew Sean Harrison handle?
Matthew Sean Harrison focuses on business, civil rights, government. Each practice area listed reflects experience handling cases of that type in California.
How long has Matthew Sean Harrison practiced law?
Matthew Sean Harrison has 11+ years of legal experience and has been licensed since 2015.
Where did Matthew Sean Harrison go to law school?
Matthew Sean Harrison earned their education at (J.D., 2010); (B.B.A. Political, 2005).
How can I contact Matthew Sean Harrison for a consultation?
You can contact Matthew Sean Harrison directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
University of Southern California Gould School of Law
- 2010
B.B.A. Political
University of Miami
- 2005

Bar Admissions

California United States District Court for the Southern District of California United States Distri
Admitted: 2015

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