Atty. Mark Osborne Heaney

Atty. Mark Osborne Heaney

Mark Osborne Heaney is a lawyer practicing criminal law, criminal appeals, appellate practice and 1 other area of law. Mark received a B.A. degree from Duke University in 1968, and has been licensed for 54 years.

Manhattan Beach Manhattan Beach 54 yrs experience 54 year
Call (737) 843-0287 Book Appointment

Profile Summary

About Mark Osborne Heaney at a glance

Mark Osborne Heaney is an Attorney based in Manhattan Beach, California. They have 54+ years of legal experience, licensed to practice since 1972. Their practice focuses on criminal defense and appellate. Admitted to practice in California (1972), U.S. District Court, Central District of California (1972), and U.S. Court of Appeals, Ninth Circuit (1972). Educated at University of Pennsylvania (J.D., 1971) and Duke University (B.A., 1968). Recognitions include AV Preeminent. Active member of State Bar of California American Bar Association National Association of Criminal Defense Lawyers Recipient, Best Lawyers in America 1983-2014. Serands clients in Manhattan Beach, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Osborne Heaney is a lawyer practicing criminal law, criminal appeals, appellate practice and 1 other area of law
  • Mark received a B.A. degree from Duke University in 1968, and has been licensed for 54 years
  • Mark practices in Manhattan Beach, CA

Practice Areas Explained

Mark Osborne Heaney's Areas of Practice

Each practice area below reflects the types of cases Mark Osborne Heaney handles, with a brief overview of what that area of law covers.

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

Mark Osborne Heaney is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in California →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Mark Osborne Heaney is one of 86,319 appellate attorneys indexed nationally. Browse appellate 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 Manhattan Beach 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 Manhattan Beach or all attorneys in California.

Frequently Asked

Common questions about Mark Osborne Heaney

Where is Mark Osborne Heaney's law office located?
Mark Osborne Heaney's law practice is located in Manhattan Beach, California. You can contact the office directly through this profile page.
What practice areas does Mark Osborne Heaney handle?
Mark Osborne Heaney focuses on criminal defense, appellate. Each practice area listed reflects experience handling cases of that type in California.
How long has Mark Osborne Heaney practiced law?
Mark Osborne Heaney has 54+ years of legal experience and has been licensed since 1972.
Where did Mark Osborne Heaney go to law school?
Mark Osborne Heaney earned their education at (J.D., 1971); (B.A., 1968).
How can I contact Mark Osborne Heaney for a consultation?
You can contact Mark Osborne Heaney 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.
What awards or recognition has Mark Osborne Heaney received?
Mark Osborne Heaney's notable recognition includes: AV Preeminent.

Education

J.D.
University of Pennsylvania
- 1971
B.A.
Duke University
- 1968

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1972
U.S. District Court, Central District of California
Admitted: 1972
U.S. Court of Appeals, Ninth Circuit
Admitted: 1972

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