Atty. William L. O'Brien

Atty. William L. O'Brien

William L. O'Brien is a lawyer practicing civil trial, business law, corporate law.

Mont Vernon Mont Vernon 49 yrs experience 49 year
Call (603) 369-4500 Book Appointment

Profile Summary

About William L. O'Brien at a glance

William L. O'Brien is a Member based in Mont Vernon, New Hampshire, practicing at Law Office of William L. O'Brien. They have 49+ years of legal experience, licensed to practice since 1977. Their practice focuses on business and litigation. Admitted to practice in Massachusetts (1977) and U.S. District Court, District of Massachusetts and U.S. Court of Appeals, First Circuit (1978). Educated at Suffolk University (J.D., 1977) and Framingham State College (B.A., 1974). Active member of Massachusetts Bar Association. Serands clients in Mont Vernon, NH and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William L. O'Brien is a lawyer practicing civil trial, business law, corporate law
  • William received a B.A. degree from Framingham State College in 1974, and has been licensed for 49 years
  • William practices at Law Office of William L. O'Brien in Mont Vernon, NH

Practice Areas Explained

William L. O'Brien's Areas of Practice

Each practice area below reflects the types of cases William L. O'Brien 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.

William L. O'Brien is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New Hampshire →

Civil Litigation

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

William L. O'Brien is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New Hampshire →

Jurisdictional Context

Why local counsel matters in New Hampshire

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

Looking for additional New Hampshire attorneys? Browse all attorneys in Mont Vernon or all attorneys in New Hampshire.

Frequently Asked

Common questions about William L. O'Brien

Where is William L. O'Brien's law office located?
William L. O'Brien's law practice is located in Mont Vernon, New Hampshire. The firm is Law Office of William L. O'Brien. You can contact the office directly through this profile page.
What practice areas does William L. O'Brien handle?
William L. O'Brien focuses on business, litigation. Each practice area listed reflects experience handling cases of that type in New Hampshire.
How long has William L. O'Brien practiced law?
William L. O'Brien has 49+ years of legal experience and has been licensed since 1977.
Where did William L. O'Brien go to law school?
William L. O'Brien earned their education at (J.D., 1977); (B.A., 1974).
How can I contact William L. O'Brien for a consultation?
You can contact William L. 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.

Education

J.D.
Suffolk University
- 1977
B.A.
Framingham State College
- 1974

Bar Admissions

Massachusetts
Admitted: 1977
U.S. District Court, District of Massachusetts and U.S. Court of Appeals, First Circuit
Admitted: 1978

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