Atty. John O'Connor

Atty. John O'Connor

John O'Connor is a lawyer practicing financial services, corporate governance, high-yield debt and 3 other areas of law. John received a B.A. degree from Yale University in 1975, and has been licensed for 39 years.

New York New York 39 yrs experience 39 year
Call (949) 988-2112 Book Appointment

Profile Summary

About John O'Connor at a glance

John O'Connor is a Partner based in New York, New York, practicing at Sullivan And Cromwell Llp. They have 39+ years of legal experience, licensed to practice since 1987. Their practice focuses on business. Admitted to practice in New York (1987). Educated at Georgetown University Law Center (J.D., 1985) and Yale University (B.A., 1975). Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John O'Connor is a lawyer practicing financial services, corporate governance, high-yield debt and 3 other areas of law
  • John received a B.A. degree from Yale University in 1975, and has been licensed for 39 years
  • John practices at Sullivan & Cromwell LLP in New York, NY and 1 other location

Practice Areas Explained

John O'Connor's Areas of Practice

Each practice area below reflects the types of cases John O'Connor 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 O'Connor is one of 501,317 business attorneys indexed nationally. Browse business 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 O'Connor

Where is John O'Connor's law office located?
John O'Connor's law practice is located in New York, New York. The firm is Sullivan And Cromwell Llp. You can contact the office directly through this profile page.
What practice areas does John O'Connor handle?
John O'Connor focuses on business. Each practice area listed reflects experience handling cases of that type in New York.
How long has John O'Connor practiced law?
John O'Connor has 39+ years of legal experience and has been licensed since 1987.
Where did John O'Connor go to law school?
John O'Connor earned their education at (J.D., 1985); (B.A., 1975).
How can I contact John O'Connor for a consultation?
You can contact John O'Connor 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.
Yale University
- 1975

Bar Admissions

New York
Admitted: 1987

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