Atty. Matthew Daniel Williamson

Atty. Matthew Daniel Williamson

Matthew Daniel Williamson is a lawyer practicing environmental and natural resources, corporate investigations & white collar defense, litigation. Matthew received a B.A. degree from University of California, San Diego in 2003, and has been licensed for 20 years.

Costa Mesa Costa Mesa 20 J. Erfahrung 20 year
Call (949) 570-9148 Book Appointment

Profile Summary

About Matthew Daniel Williamson at a glance

Matthew Daniel Williamson is an Associate, Litigation based in Costa Mesa, California, practicing at Manatt, Phelps & Phillips, LLP. They have 20+ years of legal experience, licensed to practice since 2006. Their practice focuses on white collar, litigation, and environmental. Admitted to practice in California (2006). Educated at University of California, San Diego (B.A., 2003) and University of California, Los Angeles, School of Law J.D. 2006 Chief Articles Editor University of California, Los Angeles, School of Law J.D. Journal of Environmental Law and Policy (—). Active member of Membership Activities Admitted to practice in California, Member, Orange County Bar Association, and Member, American Bar Association. Serands clients in Costa Mesa, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Matthew Daniel Williamson is a lawyer practicing environmental and natural resources, corporate investigations & white collar defense, litigation
  • Matthew received a B.A. degree from University of California, San Diego in 2003, and has been licensed for 20 years
  • Matthew practices at Manatt, Phelps & Phillips, LLP in Costa Mesa, CA

Practice Areas Explained

Matthew Daniel Williamson's Areas of Practice

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

White Collar Crimes

Matthew Daniel Williamson is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in California →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Matthew Daniel Williamson is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Environmental Law

Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

Matthew Daniel Williamson is one of 56,434 environmental attorneys indexed nationally. Browse environmental 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 Costa Mesa 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 Costa Mesa or all attorneys in California.

Frequently Asked

Common questions about Matthew Daniel Williamson

Where is Matthew Daniel Williamson's law office located?
Matthew Daniel Williamson's law practice is located in Costa Mesa, California. The firm is Manatt, Phelps & Phillips, LLP. You can contact the office directly through this profile page.
What practice areas does Matthew Daniel Williamson handle?
Matthew Daniel Williamson focuses on white collar, litigation, environmental. Each practice area listed reflects experience handling cases of that type in California.
How long has Matthew Daniel Williamson practiced law?
Matthew Daniel Williamson has 20+ years of legal experience and has been licensed since 2006.
Where did Matthew Daniel Williamson go to law school?
Matthew Daniel Williamson earned their education at (B.A., 2003); (—).
How can I contact Matthew Daniel Williamson for a consultation?
You can contact Matthew Daniel Williamson 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

B.A.
University of California, San Diego
- 2003
University of California, Los Angeles, School of Law J.D. 2006 Chief Articles Editor University of California, Los Angeles, School of Law J.D. Journal of Environmental Law and Policy
- In Bearbeitung

Bar Admissions

California
Admitted: 2006

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