Atty. Thomas Stephen Brennan

Atty. Thomas Stephen Brennan

Thomas Stephen Brennan is a lawyer practicing corporate law, securities, mergers and acquisitions and 3 other areas of law. Thomas received a B.A. degree from The Johns Hopkins University in 1990, and has been licensed for 27 years.

Boston Boston 27 yrs experience 27 year
Call (617) 228-4412 Book Appointment

Profile Summary

About Thomas Stephen Brennan at a glance

Thomas Stephen Brennan is an Of Counsel based in Boston, Massachusetts, practicing at Posternak Blankstein & Lund LLP. They have 27+ years of legal experience, licensed to practice since 1999. Their practice focuses on business, m&a, and securities. Admitted to practice in Maryland (1999) and Massachusetts (2009). Educated at University of Maryland (J.D., 1999) and The Johns Hopkins University (B.A., 1990). Active member of Maryland State and American Bar Associations. Serands clients in Boston, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Thomas Stephen Brennan is a lawyer practicing corporate law, securities, mergers and acquisitions and 3 other areas of law
  • Thomas received a B.A. degree from The Johns Hopkins University in 1990, and has been licensed for 27 years
  • Thomas practices at Posternak Blankstein & Lund LLP in Boston, MA

Practice Areas Explained

Thomas Stephen Brennan's Areas of Practice

Each practice area below reflects the types of cases Thomas Stephen Brennan 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.

Thomas Stephen Brennan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Massachusetts →

Mergers & Acquisitions

Thomas Stephen Brennan is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in Massachusetts →

Securities Law

Thomas Stephen Brennan is one of 64,529 securities attorneys indexed nationally. Browse securities 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 Thomas Stephen Brennan

Where is Thomas Stephen Brennan's law office located?
Thomas Stephen Brennan's law practice is located in Boston, Massachusetts. The firm is Posternak Blankstein & Lund LLP. You can contact the office directly through this profile page.
What practice areas does Thomas Stephen Brennan handle?
Thomas Stephen Brennan focuses on business, m&a, securities. Each practice area listed reflects experience handling cases of that type in Massachusetts.
How long has Thomas Stephen Brennan practiced law?
Thomas Stephen Brennan has 27+ years of legal experience and has been licensed since 1999.
Where did Thomas Stephen Brennan go to law school?
Thomas Stephen Brennan earned their education at (J.D., 1999); (B.A., 1990).
How can I contact Thomas Stephen Brennan for a consultation?
You can contact Thomas Stephen Brennan 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.
University of Maryland
- 1999
B.A.
The Johns Hopkins University
- 1990

Bar Admissions

Maryland
Admitted: 1999
Massachusetts
Admitted: 2009

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