Atty. William David Sullivan

Atty. William David Sullivan

Bill focuses his practice on commercial bankruptcy, creditors’ rights matters, and commercial litigation.Bill frequently appears before the Delaware Bankruptcy Court and the Delaware Chancery Court. In corporate Chapter 11 bankruptcy matters, he regularly represents Debtors, Committees, secured and unsecured creditors, trustees, asset purchasers, landlords, insurance companies, officers and directors, and governmental entities.

Wilmington Wilmington 37 J. Erfahrung 37 year
Call (302) 434-8218 Book Appointment

Profile Summary

About William David Sullivan at a glance

William David Sullivan is a Member based in Wilmington, Delaware, practforg at Sullivan Hazeltine Allinson LLC. They have 37+ years of legal experience, licensed to practice since 1989. Their practice focuses on chapter 7, trusts, business, bankruptcy, and chapter 11. Admitted to practice in California (1989), Delaware (1990), and Pennsylvania U.S. Supreme Court, U.S. Court of Appeals, Third Circuit and U.S. District Court, Distr (1990). Educated at Georgetown University Law Center (J.D., 1989) and University of Notre Dame (B.S. Chemical, 1984). Recognitions include BV Distinguished. Active member of Delaware State Bar Association (Member, Commercial Division) American Bankruptcy Institute Delaware Bankruptcy Inn of Court. Serands clients in Wilmington, DE and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

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  • Bill focuses his practice on commercial bankruptcy, creditors’ rights matters, and commercial litigation.Bill frequently appears before the Delaware Bankruptcy Court and the Delaware Chancery Court
  • In corporate Chapter 11 bankruptcy matters, he regularly represents Debtors, Committees, secured and unsecured creditors, trustees, asset purchasers, landlords, insurance companies, officers and directors, and governmental entities
  • Bill also handles general claims litigation and prosecutes and defends adversary actions, including fraudulent conveyance and preference litigation.Prior to starting his own firm, Bill was a partner with the Wilmington office of Buchanan Ingersoll, and a partner with the Wilmington firm of Elzufon Austin Reardon Tarlov & Mondell, P.A., where he developed and led its bankruptcy practice
  • His prior experience includes the handling of insurance coverage matters and personal injury litigation
  • He has tried a dozen civil cases to verdict and has argued before the Delaware Supreme Court and the Third Circuit Court of Appeals.Bill is a member of the Delaware State Bar Association, the American Bankruptcy Institute, and the Delaware Bankruptcy American Inn of Court.Recent Representations• Liberty Brands - lead counsel to the Debtor in a successful 363 sale case • WR Grace – Delaware counsel to the Zonolite Attic Insulation (ZAI) Committee, representing holders of property damage claims • Pacific Energy – lead counsel to start-up which became successful buyer of Alaskan oil and gas assets • Tribune – Delaware counsel to Wilmington Trust, as Indenture Trustee for bondholders with claims in excess of $1 billion • WP Steel – bankruptcy counsel to purchaser of former Bethlehem Steel plant site at Sparrows Point, MD • Satcon – Delaware counsel to unsecured creditors committee • CDOW – lead bankruptcy counsel to religious organizations in negotiated Chapter 11 settlement plan

Practice Areas Explained

William David Sullivan's Areas of Practice

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

Chapter 7 Bankruptcy

William David Sullivan is one of 8,886 chapter 7 attorneys indexed nationally. Browse chapter 7 attorneys in Delaware →

Trusts

William David Sullivan is one of 104,172 trusts attorneys indexed nationally. Browse trusts attorneys in Delaware →

Business & Corporate Law

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

William David Sullivan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Delaware →

Bankruptcy & Debt

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

William David Sullivan is one of 105,321 bankruptcy attorneys indexed nationally. Browse bankruptcy attorneys in Delaware →

Chapter 11 Bankruptcy

William David Sullivan is one of 5,841 chapter 11 attorneys indexed nationally. Browse chapter 11 attorneys in Delaware →

Jurisdictional Context

Why local counsel matters in Delaware

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

Looking for additional Delaware attorneys? Browse all attorneys in Wilmington or all attorneys in Delaware.

Frequently Asked

Common questions about William David Sullivan

Where is William David Sullivan's law office located?
William David Sullivan's law practice is located in Wilmington, Delaware. The firm is Sullivan Hazeltine Allinson LLC. You can contact the office directly through this profile page.
What practice areas does William David Sullivan handle?
William David Sullivan focuses on chapter 7, trusts, business, bankruptcy, chapter 11. Each practice area listed reflects experience handling cases of that type in Delaware.
How long has William David Sullivan practiced law?
William David Sullivan has 37+ years of legal experience and has been licensed since 1989.
Where did William David Sullivan go to law school?
William David Sullivan earned their education at (J.D., 1989); (B.S. Chemical, 1984).
How can I contact William David Sullivan for a consultation?
You can contact William David 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 David Sullivan received?
William David Sullivan's notable recognition includes: BV Distinguished.

Education

J.D.
Georgetown University Law Center
- 1989
B.S. Chemical
University of Notre Dame
- 1984

Awards

BV Distinguished

Bar Admissions

California
Admitted: 1989
Delaware
Admitted: 1990
Pennsylvania U.S. Supreme Court, U.S. Court of Appeals, Third Circuit and U.S. District Court, Distr
Admitted: 1990

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