Atty. Edwin Dargan Williamson

Atty. Edwin Dargan Williamson

Hon. Edwin Dargan Williamson is a lawyer practicing international law, privatizations, securities & investment fraud and 5 other areas of law.

Washington Washington 61 yrs experience 61 year
Call (771) 232-8198 Book Appointment

Profile Summary

About Edwin Dargan Williamson at a glance

Edwin Dargan Williamson is an Of Counsel based in Washington, District of Columbia, practicing at Sullivan And Cromwell Llp. They have 61+ years of legal experience, licensed to practice since 1965. Their practice focuses on business, ip, securities, consumer, and international. Admitted to practice in New York (1965) and District of Columbia (1988). Educated at New York University School of Law (J.D. University, 1964) and University of the South (B.A., 1961). Recognitions include AV Preeminent. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Hon. Edwin Dargan Williamson is a lawyer practicing international law, privatizations, securities & investment fraud and 5 other areas of law
  • Edwin received a B.A. degree from University of the South in 1961, and has been licensed for 61 years
  • Edwin practices at Sullivan & Cromwell LLP in Washington, DC and 1 other location

Practice Areas Explained

Edwin Dargan Williamson's Areas of Practice

Each practice area below reflects the types of cases Edwin Dargan Williamson 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.

Edwin Dargan Williamson is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Edwin Dargan Williamson is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in District of Columbia →

Securities Law

Edwin Dargan Williamson is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in District of Columbia →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

Edwin Dargan Williamson is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in District of Columbia →

International Law

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

Edwin Dargan Williamson is one of 40,133 international attorneys indexed nationally. Browse international 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 Edwin Dargan Williamson

Where is Edwin Dargan Williamson's law office located?
Edwin Dargan Williamson's law practice is located in Washington, District of Columbia. The firm is Sullivan And Cromwell Llp. You can contact the office directly through this profile page.
What practice areas does Edwin Dargan Williamson handle?
Edwin Dargan Williamson focuses on business, ip, securities, consumer, international. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Edwin Dargan Williamson practiced law?
Edwin Dargan Williamson has 61+ years of legal experience and has been licensed since 1965.
Where did Edwin Dargan Williamson go to law school?
Edwin Dargan Williamson earned their education at (J.D. University, 1964); (B.A., 1961).
How can I contact Edwin Dargan Williamson for a consultation?
You can contact Edwin Dargan Williamson 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 Edwin Dargan Williamson received?
Edwin Dargan Williamson's notable recognition includes: AV Preeminent.

Education

J.D. University
New York University School of Law
- 1964
B.A.
University of the South
- 1961

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1965
District of Columbia
Admitted: 1988

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