Atty. John Michael O'Brien

Atty. John Michael O'Brien

John Michael O'Brien is a lawyer practicing criminal law, personal injury. John received a B.S. degree from Quinnipiac College in 1986, and has been licensed for 36 years.

Sag Harbor Sag Harbor 36 yrs experience 36 year
Call (631) 937-3039 Book Appointment

Profile Summary

About John Michael O'Brien at a glance

John Michael O'Brien is a Member based in Sag Harbor, New York, practicing at John M. O'Brien. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on personal injury and criminal defense. Admitted to practice in New York (1990). Educated at St. John's University (J.D., 1989) and Quinnipiac College (B.S., 1986). Active member of American, Suffolk County and New York State Bar Associations. Serands clients in Sag Harbor, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Michael O'Brien is a lawyer practicing criminal law, personal injury
  • John received a B.S. degree from Quinnipiac College in 1986, and has been licensed for 36 years
  • John practices at John M. O'Brien in Sag Harbor, NY

Practice Areas Explained

John Michael O'Brien's Areas of Practice

Each practice area below reflects the types of cases John Michael O'Brien handles, with a brief overview of what that area of law covers.

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

John Michael O'Brien is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in New York →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

John Michael O'Brien is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense 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 Sag Harbor 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 Sag Harbor or all attorneys in New York.

Frequently Asked

Common questions about John Michael O'Brien

Where is John Michael O'Brien's law office located?
John Michael O'Brien's law practice is located in Sag Harbor, New York. The firm is John M. O'Brien. You can contact the office directly through this profile page.
What practice areas does John Michael O'Brien handle?
John Michael O'Brien focuses on personal injury, criminal defense. Each practice area listed reflects experience handling cases of that type in New York.
How long has John Michael O'Brien practiced law?
John Michael O'Brien has 36+ years of legal experience and has been licensed since 1990.
Where did John Michael O'Brien go to law school?
John Michael O'Brien earned their education at (J.D., 1989); (B.S., 1986).
How can I contact John Michael O'Brien for a consultation?
You can contact John Michael O'Brien 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.
St. John's University
- 1989
B.S.
Quinnipiac College
- 1986

Bar Admissions

New York
Admitted: 1990

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