Atty. Mark Casillas

Atty. Mark Casillas

Mark Casillas is a lawyer practicing corporate law, securities, business law and 1 other area of law. Mark received a degree from Loyola Marymount University, Los Angeles CA, and has been licensed for 44 years.

Tiburon Tiburon 44 yrs experience 44 year
Call (628) 284-8247 Book Appointment

Profile Summary

About Mark Casillas at a glance

Mark Casillas is an attorney based in Tiburon, California. They haand 44+ years of legal experience, licensed to practice since 1982. Admitted to practice in New York (1982) and California (1983). Educated at Loyola Marymount University, Los Angeles CA Loyola University (B.A. Harvard, 1976). Serands clients in Tiburon, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Casillas is a lawyer practicing corporate law, securities, business law and 1 other area of law
  • Mark received a degree from Loyola Marymount University, Los Angeles CA, and has been licensed for 44 years
  • Mark practices in Tiburon, CA

Jurisdictional Context

Why local counsel matters in California

Practforg law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantiand law. Cases originating in Tiburon 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 substantiand 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 Tiburon or all attorneys in California.

Frequently Asked

Common questions about Mark Casillas

Where is Mark Casillas's law office located?
Mark Casillas's law practice is located in Tiburon, California. You can contact the office directly through this profile page.
How long has Mark Casillas practiced law?
Mark Casillas has 44+ years of legal experience and has been licensed since 1982.
Where did Mark Casillas go to law school?
Mark Casillas earned their education at (B.A. Harvard, 1976).
How can I contact Mark Casillas for a consultation?
You can contact Mark Casillas 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. Harvard
Loyola Marymount University, Los Angeles CA Loyola University
- 1976

Bar Admissions

New York
Admitted: 1982
California
Admitted: 1983

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