Atty. John Joseph Sullivan

Atty. John Joseph Sullivan

John Joseph Sullivan is a lawyer practicing congressional investigations & crisis management, government relations, international trade and 2 other areas of law. John Joseph received a A.B. degree from Brown University in 1981, and has been licensed for 47 years.

Washington Washington 47 yrs experience 47 year
Call (771) 333-2417 Book Appointment

Profile Summary

About John Joseph Sullivan at a glance

John Joseph Sullivan is a Partner based in Washington, District of Columbia, practicing at Mayer Brown Llp. They have 47+ years of legal experience, licensed to practice since 1979. Their practice focuses on litigation, government, and international. Admitted to practice in District of Columbia (1979), New York (1987), US District Court for the Eastern District of New York (1988), and US District Court for the Southern District of New York (1988). Educated at Columbia Law School (J.D., 1985) and Brown University (A.B., 1981). Active member of Chairman, U, S, and -Iraq Business Dialogue Member, Board of Directors, Iraqi Refugee Assistance Project, Inc. Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Joseph Sullivan is a lawyer practicing congressional investigations & crisis management, government relations, international trade and 2 other areas of law
  • John Joseph received a A.B. degree from Brown University in 1981, and has been licensed for 47 years
  • John Joseph practices at Mayer Brown LLP in Washington, DC

Practice Areas Explained

John Joseph Sullivan's Areas of Practice

Each practice area below reflects the types of cases John Joseph Sullivan 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.

John Joseph Sullivan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in District of Columbia →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

John Joseph Sullivan is one of 132,225 government attorneys indexed nationally. Browse government attorneys in District of Columbia →

International Law

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

John Joseph Sullivan 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 John Joseph Sullivan

Where is John Joseph Sullivan's law office located?
John Joseph Sullivan's law practice is located in Washington, District of Columbia. The firm is Mayer Brown Llp. You can contact the office directly through this profile page.
What practice areas does John Joseph Sullivan handle?
John Joseph Sullivan focuses on litigation, government, international. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has John Joseph Sullivan practiced law?
John Joseph Sullivan has 47+ years of legal experience and has been licensed since 1979.
Where did John Joseph Sullivan go to law school?
John Joseph Sullivan earned their education at (J.D., 1985); (A.B., 1981).
How can I contact John Joseph Sullivan for a consultation?
You can contact John Joseph 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.

Education

J.D.
Columbia Law School
- 1985
A.B.
Brown University
- 1981

Bar Admissions

District of Columbia
Admitted: 1979
New York
Admitted: 1987
US District Court for the Eastern District of New York
Admitted: 1988
US District Court for the Southern District of New York
Admitted: 1988
US Supreme Court
Admitted: 1993
US District Court for the District of Columbia
Admitted: 1994
US Court of Appeals for the District of Columbia Circuit
Admitted: 1994
US Court of Appeals for the Ninth Circuit
Admitted: 1996

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