Atty. Thomas Brent Mason

Atty. Thomas Brent Mason

Thomas Brent Mason is a lawyer practicing white collar criminal defense, attorney discipline, civil forfeiture and 3 other areas of law. Thomas received a B.A. degree from Yale University in 1979, and has been licensed for 41 years.

Washington Washington 41 yrs experience 41 year
Call (771) 243-2363 Book Appointment

Profile Summary

About Thomas Brent Mason at a glance

Thomas Brent Mason is a Member based in Washington, District of Columbia, practicing at Harris Wiltshire And Grannis Llp. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on criminal defense, white collar, litigation, and education. Admitted to practice in Maryland (1985), U.S. District Court, District of Maryland (1985), District of Columbia U.S. Court of Appeals, Fourth, Fifth Circuit and District of Columbia Circuits (1988), and U.S. District Court for the District of Columbia (1988). Educated at Columbia University (J.D., 1983) and Yale University (B.A., 1979). Recognitions include AV Preeminent. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Thomas Brent Mason is a lawyer practicing white collar criminal defense, attorney discipline, civil forfeiture and 3 other areas of law
  • Thomas received a B.A. degree from Yale University in 1979, and has been licensed for 41 years
  • Thomas practices at Harris, Wiltshire & Grannis LLP in Washington, DC

Practice Areas Explained

Thomas Brent Mason's Areas of Practice

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

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

Thomas Brent Mason is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in District of Columbia →

White Collar Crimes

Thomas Brent Mason is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in District of Columbia →

Civil Litigation

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

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

Education Law

Education attorneys for special education (IEP), school discipline, Title IX, and student rights.

Thomas Brent Mason is one of 24,079 education attorneys indexed nationally. Browse education 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 Thomas Brent Mason

Where is Thomas Brent Mason's law office located?
Thomas Brent Mason's law practice is located in Washington, District of Columbia. The firm is Harris Wiltshire And Grannis Llp. You can contact the office directly through this profile page.
What practice areas does Thomas Brent Mason handle?
Thomas Brent Mason focuses on criminal defense, white collar, litigation, education. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Thomas Brent Mason practiced law?
Thomas Brent Mason has 41+ years of legal experience and has been licensed since 1985.
Where did Thomas Brent Mason go to law school?
Thomas Brent Mason earned their education at (J.D., 1983); (B.A., 1979).
How can I contact Thomas Brent Mason for a consultation?
You can contact Thomas Brent Mason 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 Brent Mason received?
Thomas Brent Mason's notable recognition includes: AV Preeminent.

Education

J.D.
Columbia University
- 1983
B.A.
Yale University
- 1979

Awards

AV Preeminent

Bar Admissions

Maryland
Admitted: 1985
U.S. District Court, District of Maryland
Admitted: 1985
District of Columbia U.S. Court of Appeals, Fourth, Fifth Circuit and District of Columbia Circuits
Admitted: 1988
U.S. District Court for the District of Columbia
Admitted: 1988

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