Atty. Stephen John O'Neil

Atty. Stephen John O'Neil

Stephen John O'Neil is a lawyer practicing governmental practice, government contracts, environmental and 10 other areas of law. Stephen received a B.A. degree from University of Notre Dame in 1983, and has been licensed for 40 years.

Los Angeles Los Angeles 40 yrs experience 40 year
Call (747) 400-1329 Book Appointment

Profile Summary

About Stephen John O'Neil at a glance

Stephen John O'Neil is a Partner based in Los Angeles, California, practicing at Sheppard Mullin. They have 40+ years of legal experience, licensed to practice since 1986. Their practice focuses on personal injury, business, real estate, commercial re, and m&a. Admitted to practice in California Federal District Courts for the Central and Eastern Districts of California Federal Distr (1986). Educated at University of California, Los Angeles (J.D., 1986) and University of Notre Dame (B.A., 1983). Serands clients in Los Angeles, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Stephen John O'Neil is a lawyer practicing governmental practice, government contracts, environmental and 10 other areas of law
  • Stephen received a B.A. degree from University of Notre Dame in 1983, and has been licensed for 40 years
  • Stephen practices at Sheppard Mullin in Los Angeles, CA

Practice Areas Explained

Stephen John O'Neil's Areas of Practice

Each practice area below reflects the types of cases Stephen John O'Neil handles, with a brief overview of what that area of law covers.

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

Stephen John O'Neil is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in California →

Business & Corporate Law

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

Stephen John O'Neil 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.

Stephen John O'Neil is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in California →

Commercial Real Estate

Stephen John O'Neil is one of 16,000 commercial re attorneys indexed nationally. Browse commercial re attorneys in California →

Mergers & Acquisitions

Stephen John O'Neil is one of 49,731 m&a attorneys indexed nationally. Browse m&a 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 Los Angeles 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 Los Angeles or all attorneys in California.

Frequently Asked

Common questions about Stephen John O'Neil

Where is Stephen John O'Neil's law office located?
Stephen John O'Neil's law practice is located in Los Angeles, California. The firm is Sheppard Mullin. You can contact the office directly through this profile page.
What practice areas does Stephen John O'Neil handle?
Stephen John O'Neil focuses on personal injury, business, real estate, commercial re, m&a. Each practice area listed reflects experience handling cases of that type in California.
How long has Stephen John O'Neil practiced law?
Stephen John O'Neil has 40+ years of legal experience and has been licensed since 1986.
Where did Stephen John O'Neil go to law school?
Stephen John O'Neil earned their education at (J.D., 1986); (B.A., 1983).
How can I contact Stephen John O'Neil for a consultation?
You can contact Stephen John O'Neil 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 California, Los Angeles
- 1986
B.A.
University of Notre Dame
- 1983

Bar Admissions

California Federal District Courts for the Central and Eastern Districts of California Federal Distr
Admitted: 1986

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