Atty. William Leonard Thomas

Atty. William Leonard Thomas

Mr. William Leonard Thomas is a lawyer practicing environmental law, international environmental law, litigation and 1 other area of law.

Washington Washington 36 yrs experience 36 year
Call (771) 232-9635 Book Appointment

Profile Summary

About William Leonard Thomas at a glance

William Leonard Thomas is an Attorney based in Washington, District of Columbia, practicing at Willkie Farr And Gallagher Llp. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on litigation, environmental, and entertainment. Admitted to practice in New York (1990), District of Columbia (1992), and U.S. Court of Appeals, Fourth Circuit (1993). Educated at Georgetown University (J.D., 1989) and St. Olaf College B.A. magna cum laude St. Olaf College B.A. with distinction 1986 (—). Active member of New York State, American, Inter-American, Inter-Pacific and International Bar Associations The District of Columbia Bar. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. William Leonard Thomas is a lawyer practicing environmental law, international environmental law, litigation and 1 other area of law
  • William received a B.A. degree from St. Olaf College, and has been licensed for 36 years
  • William practices at Willkie Farr & Gallagher LLP in Washington, DC

Practice Areas Explained

William Leonard Thomas's Areas of Practice

Each practice area below reflects the types of cases William Leonard Thomas handles, with a brief overview of what that area of law covers.

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

William Leonard Thomas is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →

Environmental Law

Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.

William Leonard Thomas is one of 56,434 environmental attorneys indexed nationally. Browse environmental attorneys in District of Columbia →

Entertainment & Sports Law

Entertainment lawyers for music, film, sports contracts, talent representation, and IP licensing.

William Leonard Thomas is one of 45,946 entertainment attorneys indexed nationally. Browse entertainment attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

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

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about William Leonard Thomas

Where is William Leonard Thomas's law office located?
William Leonard Thomas's law practice is located in Washington, District of Columbia. The firm is Willkie Farr And Gallagher Llp. You can contact the office directly through this profile page.
What practice areas does William Leonard Thomas handle?
William Leonard Thomas focuses on litigation, environmental, entertainment. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has William Leonard Thomas practiced law?
William Leonard Thomas has 36+ years of legal experience and has been licensed since 1990.
Where did William Leonard Thomas go to law school?
William Leonard Thomas earned their education at (J.D., 1989); (—).
How can I contact William Leonard Thomas for a consultation?
You can contact William Leonard Thomas 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.
Georgetown University
- 1989
St. Olaf College B.A. magna cum laude St. Olaf College B.A. with distinction 1986
- In Progress

Bar Admissions

New York
Admitted: 1990
District of Columbia
Admitted: 1992
U.S. Court of Appeals, Fourth Circuit
Admitted: 1993

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