Atty. Joseph Dillon Sullivan

Atty. Joseph Dillon Sullivan

Joseph Dillon Sullivan is a lawyer practicing international tax, transactional tax. Joseph received a B.A. degree from Georgetown University in 1980, and has been licensed for 41 years.

Washington Washington 41 yrs experience 41 year
Call (443) 909-5145 Book Appointment

Profile Summary

About Joseph Dillon Sullivan at a glance

Joseph Dillon Sullivan is a Partner based in Washington, District of Columbia, practicing at Latham & Watkins LLP. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on tax and international tax. Admitted to practice in Maryland (1985) and District of Columbia (1986). Educated at Georgetown University Law Center (J.D., 1985) and Georgetown University (B.A., 1980). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Joseph Dillon Sullivan is a lawyer practicing international tax, transactional tax
  • Joseph received a B.A. degree from Georgetown University in 1980, and has been licensed for 41 years
  • Joseph practices at Latham & Watkins LLP in Washington, DC

Practice Areas Explained

Joseph Dillon Sullivan's Areas of Practice

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

Joseph Dillon Sullivan is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in District of Columbia →

International Tax

Joseph Dillon Sullivan is one of 1,693 international tax attorneys indexed nationally. Browse international tax 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 Joseph Dillon Sullivan

Where is Joseph Dillon Sullivan's law office located?
Joseph Dillon Sullivan's law practice is located in Washington, District of Columbia. The firm is Latham & Watkins LLP. You can contact the office directly through this profile page.
What practice areas does Joseph Dillon Sullivan handle?
Joseph Dillon Sullivan focuses on tax, international tax. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has Joseph Dillon Sullivan practiced law?
Joseph Dillon Sullivan has 41+ years of legal experience and has been licensed since 1985.
Where did Joseph Dillon Sullivan go to law school?
Joseph Dillon Sullivan earned their education at (J.D., 1985); (B.A., 1980).
How can I contact Joseph Dillon Sullivan for a consultation?
You can contact Joseph Dillon 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.
Georgetown University Law Center
- 1985
B.A.
Georgetown University
- 1980

Bar Admissions

Maryland
Admitted: 1985
District of Columbia
Admitted: 1986

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