Atty. William John Brennan

Atty. William John Brennan

William John Brennan is a lawyer practicing commercial, appeals, business & commercial litigation and 9 other areas of law. William received a degree from Thomas M Cooley Law, and has been licensed for 32 years.

Buffalo Buffalo 32 yrs experience 32 year
Call (716) 617-5581 Book Appointment

Profile Summary

About William John Brennan at a glance

William John Brennan is a Partner based in Buffalo, New York, practicing at Phillips Lytle LLP. They have 32+ years of legal experience, licensed to practice since 1994. Their practice focuses on contracts, business, breach of contract, class action, and federal crimes. Admitted to practice in New York US Court of Appeals, Second, Ninth Circuits US District Court, Eastern, Northern, Southern, (1994). Educated at Fordham University School Of Law (J.D., 1976) and Thomas M Cooley Law University Of Notre Dame (B.A., 1968). Recognitions include AV Preeminent. Serands clients in Buffalo, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William John Brennan is a lawyer practicing commercial, appeals, business & commercial litigation and 9 other areas of law
  • William received a degree from Thomas M Cooley Law, and has been licensed for 32 years
  • William practices at Phillips Lytle LLP in Buffalo, NY

Practice Areas Explained

William John Brennan's Areas of Practice

Each practice area below reflects the types of cases William John Brennan handles, with a brief overview of what that area of law covers.

Contracts

William John Brennan is one of 76,762 contracts attorneys indexed nationally. Browse contracts attorneys in New York →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

William John Brennan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Breach of Contract

William John Brennan is one of 5,938 breach of contract attorneys indexed nationally. Browse breach of contract attorneys in New York →

Class Action

William John Brennan is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in New York →

Federal Crimes

William John Brennan is one of 6,773 federal crimes attorneys indexed nationally. Browse federal crimes attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

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

Looking for additional New York attorneys? Browse all attorneys in Buffalo or all attorneys in New York.

Frequently Asked

Common questions about William John Brennan

Where is William John Brennan's law office located?
William John Brennan's law practice is located in Buffalo, New York. The firm is Phillips Lytle LLP. You can contact the office directly through this profile page.
What practice areas does William John Brennan handle?
William John Brennan focuses on contracts, business, breach of contract, class action, federal crimes. Each practice area listed reflects experience handling cases of that type in New York.
How long has William John Brennan practiced law?
William John Brennan has 32+ years of legal experience and has been licensed since 1994.
Where did William John Brennan go to law school?
William John Brennan earned their education at (J.D., 1976); (B.A., 1968).
How can I contact William John Brennan for a consultation?
You can contact William John 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.
What awards or recognition has William John Brennan received?
William John Brennan's notable recognition includes: AV Preeminent.

Education

J.D.
Fordham University School Of Law
- 1976
B.A.
Thomas M Cooley Law University Of Notre Dame
- 1968

Awards

AV Preeminent

Bar Admissions

New York US Court of Appeals, Second, Ninth Circuits US District Court, Eastern, Northern, Southern,
Admitted: 1994

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