Atty. Thomas J. O'Sullivan

Atty. Thomas J. O'Sullivan

Thomas J. O'Sullivan is a lawyer practicing international law, antitrust, arbitration.

New York New York 60 yrs experience 60 year
Call (301) 450-0704 Book Appointment

Profile Summary

About Thomas J. O'Sullivan at a glance

Thomas J. O'Sullivan is an Attorney based in New York, New York, practicing at White Case Llp. They have 60+ years of legal experience, licensed to practice since 1966. Their practice focuses on adr and international. Admitted to practice in Connecticut (1966) and New York (1967). Educated at Harvard University (LL.B., 1966) and Yale University (A.B., 1961). Recognitions include AV Preeminent. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Thomas J. O'Sullivan is a lawyer practicing international law, antitrust, arbitration
  • Thomas J. received a A.B. degree from Yale University in 1961, and has been licensed for 60 years
  • Thomas J. practices at White & Case LLP in New York, NY

Practice Areas Explained

Thomas J. O'Sullivan's Areas of Practice

Each practice area below reflects the types of cases Thomas J. O'Sullivan handles, with a brief overview of what that area of law covers.

Mediation & Arbitration

Mediators and arbitrators for civil, commercial, family, and employment dispute resolution.

Thomas J. O'Sullivan is one of 73,906 adr attorneys indexed nationally. Browse adr attorneys in New York →

International Law

International law attorneys for cross-border transactions, trade, foreign investment, and treaties.

Thomas J. O'Sullivan is one of 40,133 international attorneys indexed nationally. Browse international attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in New York are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York 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 New York courts without local counsel or pro hac vice admission.

Looking for additional New York attorneys? Browse all attorneys in New York or all attorneys in New York.

Frequently Asked

Common questions about Thomas J. O'Sullivan

Where is Thomas J. O'Sullivan's law office located?
Thomas J. O'Sullivan's law practice is located in New York, New York. The firm is White Case Llp. You can contact the office directly through this profile page.
What practice areas does Thomas J. O'Sullivan handle?
Thomas J. O'Sullivan focuses on adr, international. Each practice area listed reflects experience handling cases of that type in New York.
How long has Thomas J. O'Sullivan practiced law?
Thomas J. O'Sullivan has 60+ years of legal experience and has been licensed since 1966.
Where did Thomas J. O'Sullivan go to law school?
Thomas J. O'Sullivan earned their education at (LL.B., 1966); (A.B., 1961).
How can I contact Thomas J. O'Sullivan for a consultation?
You can contact Thomas J. O'Sullivan 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 Thomas J. O'Sullivan received?
Thomas J. O'Sullivan's notable recognition includes: AV Preeminent.

Education

LL.B.
Harvard University
- 1966
A.B.
Yale University
- 1961

Awards

AV Preeminent

Bar Admissions

Connecticut
Admitted: 1966
New York
Admitted: 1967

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