Atty. John L. Hardiman

Atty. John L. Hardiman

John L. Hardiman is a lawyer practicing litigation, arbitration, fcpa & anti-corruption and 8 other areas of law.

New York New York 43 yrs experience 43 year
Call (866) 270-7256 Book Appointment

Profile Summary

About John L. Hardiman at a glance

John L. Hardiman is a Partner based in New York, New York, practicing at Sullivan And Cromwell Llp. They have 43+ years of legal experience, licensed to practice since 1983. Their practice focuses on business, m&a, securities, litigation, and consumer. Admitted to practice in New York (1983). Educated at Duke University School of Law (J.D., 1982) and Fairfield University (B.A., 1979). Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John L. Hardiman is a lawyer practicing litigation, arbitration, fcpa & anti-corruption and 8 other areas of law
  • John received a B.A. degree from Fairfield University in 1979, and has been licensed for 43 years
  • John practices at Sullivan & Cromwell LLP in New York, NY

Practice Areas Explained

John L. Hardiman's Areas of Practice

Each practice area below reflects the types of cases John L. Hardiman 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 L. Hardiman is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Mergers & Acquisitions

John L. Hardiman is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in New York →

Securities Law

John L. Hardiman is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in New York →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

John L. Hardiman is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New York →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

John L. Hardiman is one of 50,607 consumer attorneys indexed nationally. Browse consumer 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 L. Hardiman

Where is John L. Hardiman's law office located?
John L. Hardiman'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 L. Hardiman handle?
John L. Hardiman focuses on business, m&a, securities, litigation, consumer. Each practice area listed reflects experience handling cases of that type in New York.
How long has John L. Hardiman practiced law?
John L. Hardiman has 43+ years of legal experience and has been licensed since 1983.
Where did John L. Hardiman go to law school?
John L. Hardiman earned their education at (J.D., 1982); (B.A., 1979).
How can I contact John L. Hardiman for a consultation?
You can contact John L. Hardiman 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.
Duke University School of Law
- 1982
B.A.
Fairfield University
- 1979

Bar Admissions

New York
Admitted: 1983

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