Atty. William Lee Twomey

Atty. William Lee Twomey

William Lee Twomey is a lawyer practicing corporate law, securities law, business law and 1 other area of law. William received a B.A. degree from University of California at Santa Barbara in 1977, and has been licensed for 45 years.

Irvine Irvine 45 yrs experience 45 year
Call (626) 268-1613 Book Appointment

Profile Summary

About William Lee Twomey at a glance

William Lee Twomey is a Partner based in Irvine, California, practicing at O Neil Llp. They have 45+ years of legal experience, licensed to practice since 1981. Their practice focuses on business, m&a, and securities. Admitted to practice in California (1981). Educated at University of California at Los Angeles (J.D., 1981) and University of California at Santa Barbara (B.A., 1977). Recognitions include AV Preeminent. Serands clients in Irvine, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Lee Twomey is a lawyer practicing corporate law, securities law, business law and 1 other area of law
  • William received a B.A. degree from University of California at Santa Barbara in 1977, and has been licensed for 45 years
  • William practices at O'Neil LLP in Irvine, CA

Practice Areas Explained

William Lee Twomey's Areas of Practice

Each practice area below reflects the types of cases William Lee Twomey 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.

William Lee Twomey is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Mergers & Acquisitions

William Lee Twomey is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in California →

Securities Law

William Lee Twomey is one of 64,529 securities attorneys indexed nationally. Browse securities 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 Irvine 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 Irvine or all attorneys in California.

Frequently Asked

Common questions about William Lee Twomey

Where is William Lee Twomey's law office located?
William Lee Twomey's law practice is located in Irvine, California. The firm is O Neil Llp. You can contact the office directly through this profile page.
What practice areas does William Lee Twomey handle?
William Lee Twomey focuses on business, m&a, securities. Each practice area listed reflects experience handling cases of that type in California.
How long has William Lee Twomey practiced law?
William Lee Twomey has 45+ years of legal experience and has been licensed since 1981.
Where did William Lee Twomey go to law school?
William Lee Twomey earned their education at (J.D., 1981); (B.A., 1977).
How can I contact William Lee Twomey for a consultation?
You can contact William Lee Twomey 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 William Lee Twomey received?
William Lee Twomey's notable recognition includes: AV Preeminent.

Education

J.D.
University of California at Los Angeles
- 1981
B.A.
University of California at Santa Barbara
- 1977

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1981

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