Atty. John Joseph Sullivan

Atty. John Joseph Sullivan

John Joseph Sullivan is a lawyer practicing commercial banking, corporate, derivatives, structured finance and financial products and 7 other areas of law. John received a B.A. degree from Yale University in 1974, and has been licensed for 48 years.

New York New York 48 yrs experience 48 year
Call (332) 252-0376 Book Appointment

Profile Summary

About John Joseph Sullivan at a glance

John Joseph Sullivan is a Partner based in New York, New York, practicing at McDermott Will & Emery LLP. They have 48+ years of legal experience, licensed to practice since 1978. Their practice focuses on business, energy, and international. Admitted to practice in New York (1978) and District of Columbia (1980). Educated at Georgetown University Law Center (J.D., 1977) and Yale University (B.A., 1974). Active member of American Bar Assn. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Joseph Sullivan is a lawyer practicing commercial banking, corporate, derivatives, structured finance and financial products and 7 other areas of law
  • John received a B.A. degree from Yale University in 1974, and has been licensed for 48 years
  • John practices at McDermott Will & Emery LLP in New York, NY

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.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John Joseph Sullivan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

John Joseph Sullivan is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in New York →

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 New York →

Jurisdictional Context

Why local counsel matters in New York

Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in New York are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York 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 New York courts without local counsel or pro hac vice admission.

Looking for additional New York attorneys? Browse all attorneys in New York or all attorneys in New York.

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 New York, New York. The firm is McDermott Will & Emery LLP. You can contact the office directly through this profile page.
What practice areas does John Joseph Sullivan handle?
John Joseph Sullivan focuses on business, energy, international. Each practice area listed reflects experience handling cases of that type in New York.
How long has John Joseph Sullivan practiced law?
John Joseph Sullivan has 48+ years of legal experience and has been licensed since 1978.
Where did John Joseph Sullivan go to law school?
John Joseph Sullivan earned their education at (J.D., 1977); (B.A., 1974).
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.
Georgetown University Law Center
- 1977
B.A.
Yale University
- 1974

Bar Admissions

New York
Admitted: 1978
District of Columbia
Admitted: 1980

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