Atty. Brien T. O'Connor

Atty. Brien T. O'Connor

Brien T. O'Connor is a lawyer practicing litigation, complex business litigation, foreign corrupt practices act and 8 other areas of law.

Boston Boston 41 yrs experience 41 year
Call (857) 416-2876 Book Appointment

Profile Summary

About Brien T. O'Connor at a glance

Brien T. O'Connor is a Partner based in Boston, Massachusetts, practicing at Ropes & Gray LLP. They have 41+ years of legal experience, licensed to practice since 1985. Their practice focuses on business, securities, litigation, government, and health care. Admitted to practice in Massachusetts U.S. Court of Appeals, First Circuit U.S. District Court, District of Massachusetts (1985). Educated at University of Pennsylvania Law School (J.D., 1985) and Yale University (B.A., 1981). Recognitions include AV Preeminent. Active member of Boston (Member, Steering Committee, Criminal Law Section), Massachusetts and American (Co-Chair, Northeast Region, White Collar Crime Section) Bar Associations. Serands clients in Boston, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Brien T. O'Connor is a lawyer practicing litigation, complex business litigation, foreign corrupt practices act and 8 other areas of law
  • Brien received a B.A. degree from Yale University in 1981, and has been licensed for 41 years
  • Brien practices at Ropes & Gray LLP in Boston, MA

Practice Areas Explained

Brien T. O'Connor's Areas of Practice

Each practice area below reflects the types of cases Brien T. O'Connor 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.

Brien T. O'Connor is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Massachusetts →

Securities Law

Brien T. O'Connor is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in Massachusetts →

Civil Litigation

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

Brien T. O'Connor is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Massachusetts →

Government & Administrative Law

Attorneys for administrative law, agency hearings, government contracts, licensing, and public benefits.

Brien T. O'Connor is one of 132,225 government attorneys indexed nationally. Browse government attorneys in Massachusetts →

Health Care Law

Health care attorneys for HIPAA, Medicare, Medicaid, regulatory compliance, and medical licensing matters.

Brien T. O'Connor is one of 66,735 health care attorneys indexed nationally. Browse health care attorneys in Massachusetts →

Jurisdictional Context

Why local counsel matters in Massachusetts

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

Looking for additional Massachusetts attorneys? Browse all attorneys in Boston or all attorneys in Massachusetts.

Frequently Asked

Common questions about Brien T. O'Connor

Where is Brien T. O'Connor's law office located?
Brien T. O'Connor's law practice is located in Boston, Massachusetts. The firm is Ropes & Gray LLP. You can contact the office directly through this profile page.
What practice areas does Brien T. O'Connor handle?
Brien T. O'Connor focuses on business, securities, litigation, government, health care. Each practice area listed reflects experience handling cases of that type in Massachusetts.
How long has Brien T. O'Connor practiced law?
Brien T. O'Connor has 41+ years of legal experience and has been licensed since 1985.
Where did Brien T. O'Connor go to law school?
Brien T. O'Connor earned their education at (J.D., 1985); (B.A., 1981).
How can I contact Brien T. O'Connor for a consultation?
You can contact Brien T. O'Connor 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 Brien T. O'Connor received?
Brien T. O'Connor's notable recognition includes: AV Preeminent.

Education

J.D.
University of Pennsylvania Law School
- 1985
B.A.
Yale University
- 1981

Awards

AV Preeminent

Bar Admissions

Massachusetts U.S. Court of Appeals, First Circuit U.S. District Court, District of Massachusetts
Admitted: 1985

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