Atty. David Leon Osias

Atty. David Leon Osias

Mr. David Leon Osias is a lawyer practicing bankruptcy & creditors' rights, water rights & resources, business law and 4 other areas of law.

San Diego San Diego 47 yrs experience 47 year
Call (619) 356-3576 Book Appointment

Profile Summary

About David Leon Osias at a glance

David Leon Osias is a Managing Partner based in San Diego, California, practicing at Allen Matkins Leck Gamble Mallory & Natsis LLP. They have 47+ years of legal experience, licensed to practice since 1979. Their practice focuses on business, real estate, bankruptcy, zoning, and creditor rights. Admitted to practice in California Ninth Circuit Court of Appeals U.S. District Court, Southern District of California U.S. (1979). Educated at University of California, Berkeley, School of Law at Boalt Hall J.D. (—) and University of California, Davis B.S. with honors (—). Recognitions include AV Preeminent. Serands clients in San Diego, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. David Leon Osias is a lawyer practicing bankruptcy & creditors' rights, water rights & resources, business law and 4 other areas of law
  • David received a B.S. degree from University of California, Davis, and has been licensed for 47 years
  • David practices at Allen Matkins Leck Gamble Mallory & Natsis LLP in San Diego, CA

Practice Areas Explained

David Leon Osias's Areas of Practice

Each practice area below reflects the types of cases David Leon Osias 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.

David Leon Osias is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

David Leon Osias is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in California →

Bankruptcy & Debt

A bankruptcy attorney can help you eliminate debt, stop creditor harassment, and protect your home through Chapter 7 or Chapter 13.

David Leon Osias is one of 105,321 bankruptcy attorneys indexed nationally. Browse bankruptcy attorneys in California →

Land Use & Zoning

David Leon Osias is one of 40,226 zoning attorneys indexed nationally. Browse zoning attorneys in California →

Creditor Rights & Collections

David Leon Osias is one of 42,948 creditor rights attorneys indexed nationally. Browse creditor rights 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 San Diego 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 San Diego or all attorneys in California.

Frequently Asked

Common questions about David Leon Osias

Where is David Leon Osias's law office located?
David Leon Osias's law practice is located in San Diego, California. The firm is Allen Matkins Leck Gamble Mallory & Natsis LLP. You can contact the office directly through this profile page.
What practice areas does David Leon Osias handle?
David Leon Osias focuses on business, real estate, bankruptcy, zoning, creditor rights. Each practice area listed reflects experience handling cases of that type in California.
How long has David Leon Osias practiced law?
David Leon Osias has 47+ years of legal experience and has been licensed since 1979.
Where did David Leon Osias go to law school?
David Leon Osias earned their education at (—); (—).
How can I contact David Leon Osias for a consultation?
You can contact David Leon Osias 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 David Leon Osias received?
David Leon Osias's notable recognition includes: AV Preeminent.

Education

University of California, Berkeley, School of Law at Boalt Hall J.D.
- In Progress
University of California, Davis B.S. with honors
- In Progress

Awards

AV Preeminent

Bar Admissions

California Ninth Circuit Court of Appeals U.S. District Court, Southern District of California U.S.
Admitted: 1979

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