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.
General Practice & More Attorney · Serving New Haven, CT · 36+ Years Experience
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. Serves clients in New Haven, CT and the surrounding metropolitan area.
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About 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
- Frederick practices in New Haven, CT
Practice Areas Explained
Frederick Mark O Brien's Areas of Legal Practice
Each practice area below reflects the types of cases Frederick Mark O Brien handles, with a practical overview of what that area of law involves and how it may apply to your situation in New Haven.
Personal Injury in New Haven
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 262,557 personal injury attorneys indexed nationally. Browse personal injury attorneys in Connecticut →
Criminal Defense in New Haven
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 212,605 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Connecticut →
Land Use & Zoning in New Haven
Frederick Mark O Brien is one of 39,875 zoning attorneys indexed nationally. Browse zoning attorneys in Connecticut →
Slip & Fall / Premises Liability in New Haven
Frederick Mark O Brien is one of 29,187 slip & fall attorneys indexed nationally. Browse slip & fall attorneys in Connecticut →
Product Liability in New Haven
Frederick Mark O Brien is one of 65,610 product liability attorneys indexed nationally. Browse product liability attorneys in Connecticut →
Jurisdictional Context
Why Local Counsel Matters in New Haven
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 venue, 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.
New Haven Courts and Legal Process
Choosing a New Haven-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional Connecticut attorneys? Browse all attorneys in New Haven or all attorneys in Connecticut.
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Professional Profile
Why Clients in New Haven Choose Frederick Mark O Brien
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Frederick Mark O Brien's practice in the field of personal injury, criminal defense, zoning, slip & fall, and product liability.
Decade-Tested Legal Experience
Frederick Mark O Brien brings 36+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in Connecticut and U.S. District Court, District of Connecticut U.S. Court of Appeals, Second Circuit, Frederick Mark O Brien can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering personal injury, criminal defense, and zoning, Frederick Mark O Brien can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in New Haven
A New Haven-based practice means Frederick Mark O Brien attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Frederick Mark O Brien Handles in New Haven
Below is a representative sample of the types of matters Frederick Mark O Brien has experience with under Connecticut law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Frederick Mark O Brien directly to discuss the specifics of your situation.
Search Reference
How People Find Frederick Mark O Brien Online
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Frederick Mark O Brien's Practice Areas & Specializations
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