Atty. Paul Leonard Sieben

Atty. Paul Leonard Sieben

Paul Leonard Sieben is a lawyer practicing securities offerings, private equity and venture capital, emerging technology and 1 other area of law. Paul received a B.A. degree from University of California, Santa Barbara, and has been licensed for 28 years.

Menlo Park Menlo Park 28 yrs experience 28 year
Call (650) 715-4564 Book Appointment

Profile Summary

About Paul Leonard Sieben at a glance

Paul Leonard Sieben is a Partner based in Menlo Park, California, practicing at O'Melveny & Myers LLP. They have 28+ years of legal experience, licensed to practice since 1998. Their practice focuses on business, m&a, and securities. Admitted to practice in California (1998). Educated at University of California, Santa Barbara B.A. with high honors Dean's List University of California, Santa Barbara B.A. University of California University of California, Santa Barbara B.A. Lo (—). Serands clients in Menlo Park, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Paul Leonard Sieben is a lawyer practicing securities offerings, private equity and venture capital, emerging technology and 1 other area of law
  • Paul received a B.A. degree from University of California, Santa Barbara, and has been licensed for 28 years
  • Paul practices at O'Melveny & Myers LLP in Menlo Park, CA

Practice Areas Explained

Paul Leonard Sieben's Areas of Practice

Each practice area below reflects the types of cases Paul Leonard Sieben 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.

Paul Leonard Sieben is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Mergers & Acquisitions

Paul Leonard Sieben is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in California →

Securities Law

Paul Leonard Sieben 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 Menlo Park 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 Menlo Park or all attorneys in California.

Frequently Asked

Common questions about Paul Leonard Sieben

Where is Paul Leonard Sieben's law office located?
Paul Leonard Sieben's law practice is located in Menlo Park, California. The firm is O'Melveny & Myers LLP. You can contact the office directly through this profile page.
What practice areas does Paul Leonard Sieben handle?
Paul Leonard Sieben focuses on business, m&a, securities. Each practice area listed reflects experience handling cases of that type in California.
How long has Paul Leonard Sieben practiced law?
Paul Leonard Sieben has 28+ years of legal experience and has been licensed since 1998.
Where did Paul Leonard Sieben go to law school?
Paul Leonard Sieben earned their education at (—).
How can I contact Paul Leonard Sieben for a consultation?
You can contact Paul Leonard Sieben 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

University of California, Santa Barbara B.A. with high honors Dean's List University of California, Santa Barbara B.A. University of California University of California, Santa Barbara B.A. Lo
- In Progress

Bar Admissions

California
Admitted: 1998

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