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William J O Brien

Practice areas:

General Practice, Environmental and Natural Resources, Personal Injury, Government, Family

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About Me

Delany & O’Brien is a progressive defense litigation law firm committed to providing its clients with high-quality, cost-effective legal services. We have strategically placed offices in Pennsylvania, New Jersey and New York. We concentrate our practice in the fields of general liability, environmental and toxic torts, products liability, construction/industrial personal injury litigation, employer/employee liability and all other types of complex litigation. Visit us at



Upon graduation from law school, Bill practiced in Washington, D.C. with the law firm of Casey, Scott & Canfield. During this time he represented a number of insurance carriers, focusing on construction and toxic tort litigation. 

In 1987 Bill joined Budd, Larner as an associate in their Cherry Hill office. While at Budd, Larner he handled a wide range of matters, including environmental and toxic tort litigation, defense of products liability claims, public liability/§1983 claims and complex construction and commercial claims.

Since 1990, when the Delany & O'Brien partnership was formed, Bill has focused much of his time towards environmental, toxic and mass tort litigation. Bill has successfully tried over a dozen asbestos cases, in addition to serving as regional and national counsel for a number of asbestos defendants. More recently Bill has represented defendants in the latex glove litigation, and is serving as local and national counsel for a number of defendants. In his capacity as regional and national counsel, Bill has not only been called upon to handle significant matters throughout the country, but has developed strategy nationwide for defendants involved in thousands of cases.

In addition to Bill's environmental work, and related insurance coverage work, he continues to handle and supervise the defense of a variety of claims, including product liability and public liability/§1983 claims. Bill's knowledge and trial experience permit him to also handle complex commercial matters in our local state and federal courts.


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Practice Areas

Licensed since 1986

  1. Personal Injury: 25%
  2. Environmental and Natural Resources: 25%
  3. General Practice: 25%
  4. Government: 15%
  5. Family: 10%


Payment Types:

Cash, Check

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Contact Info

Delany and O'Brien: Attorneys at Law

The Bourse, Suite 1002
111 South Independence Mall East
Philadelphia, PA, 19106-2526

Delany and O'Brien: Attorneys at Law

161 North Broad Street
Woodbury, NJ, 08096

Delany and O'Brien: Attorneys at Law

80 Broad Street, 5th Floor
New York, NY, 10004




DCActive 198905/24/2015
NYDeleted Unknown05/21/2011

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.

Avvo Contributions

Legal Answers

Work Experience

TitleCompany NameDuration
Founding Partnert/OwnerDelany and O'Brien: Attorneys at Law1990 - Present
Sr. AssociateBudd, Larner, Gross, Picillo, Rosenbaum, Greenberg & Sade1987 - 1990
AssociateCasey, Scott & Canfield1986 - 1987


Association NamePosition NameDuration
Philadelphia Bar AssociationN/AN/A
United States Court of Appeals for Third CircuitN/AN/A
United States District Court for the Eastern District of PennsylvaniaN/AN/A
United States District Court for the District of New JerseyN/AN/A
United States Supreme CourtN/AN/A
New York Supreme CourtN/AN/A
Pennsylvania Supreme CourtN/AN/A
New Jersey Supreme CourtN/AN/A
Trial Lawyers AssociationN/AN/A
Washington, D. C. Bar AssociationN/AN/A
New Jersey Bar AssociationN/AN/A
Camden County Bar AssociationN/AN/A
Pennsylvania Bar AssociationN/AN/A
Court of Appeals, Washington, D.C.N/AN/A

Legal Cases

Case NameOutcome
National Schools v. Basic, Inc. et al.successful

See all Legal Cases 


School NameMajorDegreeGraduated
Catholic University School of LawLawJD1986
Bost CollegePolitical ScienceBS - Bachelor of Science1983