Atty. William John O Sullivan

Atty. William John O Sullivan

William John O Sullivan is a lawyer practicing business law, bankruptcy law, litigation. William received a B.A. degree from University of Connecticut in 1982, and has been licensed for 36 years.

Glastonbury Glastonbury 36 yrs experience 36 year
Call (959) 777-3761 Book Appointment

Profile Summary

About William John O Sullivan at a glance

William John O Sullivan is a Member based in Glastonbury, Connecticut, practicing at Osullivan Mccormack Jensen Bliss Pc. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on business, bankruptcy, and litigation. Admitted to practice in Connecticut (1990), U.S. District Court, District of Connecticut (1991), U.S. Court of Appeals, Second Circuit (1996), and U.S. District Court, Southern District of New York (2002). Educated at University of Connecticut (J.D., 1990) and University of Connecticut (B.A., 1982). Recognitions include AV Preeminent. Active member of Hartford County and Connecticut (Member, Commercial Law and Bankruptcy Section Chair, Business Torts Committee) Bar Associations. Serands clients in Glastonbury, CT and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William John O Sullivan is a lawyer practicing business law, bankruptcy law, litigation
  • William received a B.A. degree from University of Connecticut in 1982, and has been licensed for 36 years
  • William practices at O'Sullivan McCormack Jensen & Bliss, PC in Glastonbury, CT

Practice Areas Explained

William John O Sullivan's Areas of Practice

Each practice area below reflects the types of cases William John O Sullivan 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 John O Sullivan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Connecticut →

Bankruptcy & Debt

A bankruptcy attorney can help you eliminate debt, stop creditor harassment, and protect your home through Chapter 7 or Chapter 13.

William John O Sullivan is one of 105,321 bankruptcy attorneys indexed nationally. Browse bankruptcy attorneys in Connecticut →

Civil Litigation

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

William John O Sullivan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Connecticut →

Jurisdictional Context

Why local counsel matters in Connecticut

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 Glastonbury 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 andnue, 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.

Looking for additional Connecticut attorneys? Browse all attorneys in Glastonbury or all attorneys in Connecticut.

Frequently Asked

Common questions about William John O Sullivan

Where is William John O Sullivan's law office located?
William John O Sullivan's law practice is located in Glastonbury, Connecticut. The firm is Osullivan Mccormack Jensen Bliss Pc. You can contact the office directly through this profile page.
What practice areas does William John O Sullivan handle?
William John O Sullivan focuses on business, bankruptcy, litigation. Each practice area listed reflects experience handling cases of that type in Connecticut.
How long has William John O Sullivan practiced law?
William John O Sullivan has 36+ years of legal experience and has been licensed since 1990.
Where did William John O Sullivan go to law school?
William John O Sullivan earned their education at (J.D., 1990); (B.A., 1982).
How can I contact William John O Sullivan for a consultation?
You can contact William John O Sullivan 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 O Sullivan received?
William John O Sullivan's notable recognition includes: AV Preeminent.

Education

J.D.
University of Connecticut
- 1990
B.A.
University of Connecticut
- 1982

Awards

AV Preeminent

Bar Admissions

Connecticut
Admitted: 1990
U.S. District Court, District of Connecticut
Admitted: 1991
U.S. Court of Appeals, Second Circuit
Admitted: 1996
U.S. District Court, Southern District of New York
Admitted: 2002

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