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Atty. Donald T Williamson

Atty. Donald T Williamson

Mr. Donald T Williamson is a lawyer practicing federal tax law, international law.

Washington Washington 48 yrs experience 48 year
Call (771) 772-4142 Book Appointment

Profile Summary

About Donald T Williamson at a glance

Donald T Williamson is an Amer. Univ. based in Washington, District of Columbia. They have 48+ years of legal experience, licensed to practice since 1978. Their practice focuses on tax and international. Admitted to practice in New York (1978), District of Columbia (1978), Maryland (1980), and U.S. Tax Court (1980). Educated at Cornell University (J.D. Georgetown, 1977) and Cornell University (M.B.A. Hamilton, 1976). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. Donald T Williamson is a lawyer practicing federal tax law, international law
  • Donald received a M.B.A. degree from Cornell University in 1976, and has been licensed for 48 years
  • Donald practices in Washington, DC

Practice Areas Explained

Donald T Williamson's Areas of Practice

Each practice area below reflects the types of cases Donald T Williamson handles, with a brief overview of what that area of law covers.

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

Donald T Williamson is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in District of Columbia →

International Law

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

Donald T 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 Donald T Williamson

Where is Donald T Williamson's law office located?
Donald T Williamson's law practice is located in Washington, District of Columbia. You can contact the office directly through this profile page.
What practice areas does Donald T Williamson handle?
Donald T Williamson focuses on tax, international. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Donald T Williamson practiced law?
Donald T Williamson has 48+ years of legal experience and has been licensed since 1978.
Where did Donald T Williamson go to law school?
Donald T Williamson earned their education at (J.D. Georgetown, 1977); (M.B.A. Hamilton, 1976).
How can I contact Donald T Williamson for a consultation?
You can contact Donald T 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.

Education

J.D. Georgetown
Cornell University
- 1977
M.B.A. Hamilton
Cornell University
- 1976

Bar Admissions

New York
Admitted: 1978
District of Columbia
Admitted: 1978
Maryland
Admitted: 1980
U.S. Tax Court
Admitted: 1980
U.S. Supreme Court
Admitted: 1988

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