Atty. Frederick Mark O Brien

Atty. Frederick Mark O Brien

Frederick Mark O Brien is a lawyer practicing general practice, trial practice, insurance and 9 other areas of law. Frederick received a A.B. degree from University of California at Berkeley in 1975, and has been licensed for 36 years.

New Haven New Haven 36 yrs experience 36 year
Call (475) 306-7913 Book Appointment

Profile Summary

About Frederick Mark O Brien at a glance

Frederick Mark O Brien is a personal injury, criminal defense, zoning, slip & fall, and product liability attorney based in New Haven, Connecticut. They have 36+ years of legal experience, licensed to practice since 1990. Admitted to practice in Connecticut (1990) and U.S. District Court, District of Connecticut U.S. Court of Appeals, Second Circuit (1991). Educated at University of Connecticut (J.D., 1990) and University of California at Berkeley (A.B., 1975). Recognitions include BV Distinguished. Active member of New Haven Bar Association and Defense Research Institute. Serands clients in New Haven, CT and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Frederick Mark O Brien is a lawyer practicing general practice, trial practice, insurance and 9 other areas of law
  • Frederick received a A.B. degree from University of California at Berkeley in 1975, and has been licensed for 36 years
  • Frederick practices in New Haven, CT

Practice Areas Explained

Frederick Mark O Brien's Areas of Practice

Each practice area below reflects the types of cases Frederick Mark 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.

Frederick Mark O Brien is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in Connecticut →

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.

Frederick Mark O Brien is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Connecticut →

Land Use & Zoning

Frederick Mark O Brien is one of 40,226 zoning attorneys indexed nationally. Browse zoning attorneys in Connecticut →

Slip & Fall / Premises Liability

Frederick Mark O Brien is one of 29,473 slip & fall attorneys indexed nationally. Browse slip & fall attorneys in Connecticut →

Product Liability

Frederick Mark O Brien is one of 66,193 product liability attorneys indexed nationally. Browse product liability attorneys in Connecticut →

Jurisdictional Context

Why local counsel matters in Connecticut

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

Looking for additional Connecticut attorneys? Browse all attorneys in New Haven or all attorneys in Connecticut.

Frequently Asked

Common questions about Frederick Mark O Brien

Where is Frederick Mark O Brien's law office located?
Frederick Mark O Brien's law practice is located in New Haven, Connecticut. You can contact the office directly through this profile page.
What practice areas does Frederick Mark O Brien handle?
Frederick Mark O Brien focuses on personal injury, criminal defense, zoning, slip & fall, product liability. Each practice area listed reflects experience handling cases of that type in Connecticut.
How long has Frederick Mark O Brien practiced law?
Frederick Mark O Brien has 36+ years of legal experience and has been licensed since 1990.
Where did Frederick Mark O Brien go to law school?
Frederick Mark O Brien earned their education at (J.D., 1990); (A.B., 1975).
How can I contact Frederick Mark O Brien for a consultation?
You can contact Frederick Mark 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.
What awards or recognition has Frederick Mark O Brien received?
Frederick Mark O Brien's notable recognition includes: BV Distinguished.

Education

J.D.
University of Connecticut
- 1990
A.B.
University of California at Berkeley
- 1975

Awards

BV Distinguished

Bar Admissions

Connecticut
Admitted: 1990
U.S. District Court, District of Connecticut U.S. Court of Appeals, Second Circuit
Admitted: 1991

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