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Atty. John J. Mangan

Atty. John J. Mangan

Mr. John J.

Washington Washington 58 yrs experience 58 year
Call (771) 216-9296 Book Appointment

Profile Summary

About John J. Mangan at a glance

John J. Mangan is an Of Counsel based in Washington, District of Columbia, practicing at Skadden Arps Slate Meagher And Flom Llp. They have 58+ years of legal experience, licensed to practice since 1968. Their practice focuses on international. Admitted to practice in Pennsylvania (1968) and District of Columbia (1990). Educated at Cornell University (J.D., 1967) and Cornell University (B.C.E., 1964). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. John J. Mangan is a lawyer practicing international law
  • John received a B.C.E. degree from Cornell University in 1964, and has been licensed for 58 years
  • John practices at Skadden, Arps, Slate, Meagher & Flom LLP in Washington, DC

Practice Areas Explained

John J. Mangan's Areas of Practice

Each practice area below reflects the types of cases John J. Mangan handles, with a brief overview of what that area of law covers.

International Law

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

John J. Mangan 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 J. Mangan

Where is John J. Mangan's law office located?
John J. Mangan's law practice is located in Washington, District of Columbia. The firm is Skadden Arps Slate Meagher And Flom Llp. You can contact the office directly through this profile page.
What practice areas does John J. Mangan handle?
John J. Mangan focuses on international. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has John J. Mangan practiced law?
John J. Mangan has 58+ years of legal experience and has been licensed since 1968.
Where did John J. Mangan go to law school?
John J. Mangan earned their education at (J.D., 1967); (B.C.E., 1964).
How can I contact John J. Mangan for a consultation?
You can contact John J. Mangan 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.

Practice Areas

Education

J.D.
Cornell University
- 1967
B.C.E.
Cornell University
- 1964

Bar Admissions

Pennsylvania
Admitted: 1968
District of Columbia
Admitted: 1990

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