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William T. Hangley
Practice Group:
University of Pennsylvania Law School
Hangley Aronchick Segal Pudlin & Schiller
One Logan Square
18th & Cherry Streets, 27th Floor
Philadelphia, PA 19103-6933
Phone: 215.496.7001
Fax: 215.568.0300


William T. Hangley, a trial lawyer, is a founder and the former Chair of Hangley Aronchick Segal Pudlin & Schiller. His trial practice includes First Amendment, antitrust, intellectual property, estates, franchise, environmental, construction, employment, securities, attorney malpractice, and general business cases. Attorney Malpractice defense accounts for approximately 20 percent of Bill’s caseload.  

A 1966 graduate cum laude of the University of Pennsylvania Law School, Bill was Comment Editor of the Law Review and was elected to the Order of the Coif. He holds a BS in music from SUNY College at Fredonia and taught elementary school vocal music in another life.

By appointment of Chief Justice John G. Roberts, Bill served on the on the United States Judicial Conference’s Advisory Committee on Evidence Rules for six years, completing his service in 2012. He has also served as Chair of the Third Circuit Lawyers’ Advisory Committee, appointed Chief Judge Anthony Scirica.

Bill is a Fellow of the American College of Trial Lawyers, and served a two-year term as Chair of the College’s Committee on the Federal Rules of Evidence. For the past several years, he has served on the College’s Task Force on Discovery and the Civil Justice System. Over the years, he has served on various College committees and task forces including the Pennsylvania State Committee and the Ad Hoc Committee on the Importance of an Independent Judiciary. In 2002, on behalf of the College, Bill wrote and published the College’s attack on the appellate trend toward “unpublished,” “non-precedential,” or “uncitable” opinions (see "Opinions Hidden," below), and later testified on behalf of the College before the Advisory Committee on Appellate Rules in support of then-proposed Fed. R. App. P. 32.1. The Standing Committee of the Judicial Conference cited and quoted "Opinions Hidden" in submitting the proposed new rule to the United States Supreme Court for consideration.

Bill is also a Fellow of the American Bar Foundation and a member of the American Law Institute. He served two terms as a member and ultimately Chairman of the Pennsylvania Interest on Lawyers Trust Accounts Board.

He is a Master of the Bench of the University of Pennsylvania Law School American Inn of Court. By appointment of the Board of Judges of the Philadelphia Court of Common Pleas, Bill served as a Judge Pro Tem of that court during a crash program to reduce docket backlog in that court. He presided over jury and nonjury trials. Bill is a member of the Advisory Committee of Community Legal Services, has been a member of the Board of Advisors of the Public Interest Law Center of Philadelphia, and has served in the Pennsylvania Bar Association House of Delegates.

Bill served a three-year term as a member of the Council (the governing body) of the American Bar Association Section of Litigation. During his long involvement in Section leadership he has chaired several committees and task forces (Civil Procedure, Merit Selection, Discovery, Training the New Lawyer, and others). He is currently the Co-Chair of the Federal Practice Task Force of the Section.


University of Pennsylvania Law School, Philadelphia, Pennsylvania, 1966, LLB, cum laude, Order of the Coif  

State University of New York College, Fredonia, New York, 1963, BS  

Honors and Awards

  • Beginning with its first edition, Chambers USA: America’s Leading Lawyers for Business has named Bill as one of five or six Band One Commercial Trial Lawyers in Pennsylvania.
  • He has been consistently recognized by The Best Lawyers in America as one of a handful of “Bet Your Company” Pennsylvania trial lawyers.
  • Bill is consistently named a Local Litigation Star by Benchmark: The Definitive Guide to America’s Leading Litigation Firms and Attorneys.
  • Bill has been identified every year in Pennsylvania Super Lawyers magazine as one of the top lawyers in Pennsylvania, and he has been ranked a Top 10 lawyer in Pennsylvania numerous times.
  • He is also named annually in Who’s Who Legal and the International Who’s Who of Business Lawyers, as one of Pennsylvania’s top five business trial lawyers.
  • Who’s Who in America, 1995 – Present
  • American College of Trial Lawyers, Fellow, 1987 – Present
  • American Bar Foundation, Fellow
  • Salzburg Seminar in American Studies, Law, University of Pennsylvania Fellow, 1970
  • University of Pennsylvania Law Review, Comment Editor



  • Subject of feature article, "Calm in the Courtroom: Trial Lawyer Bill Hangley Wins Cases With Conversation and Charm," by Nick DiUlio, Pennsylvania Super Lawyers, 2012
  • “Opinions Hidden, Citations Forbidden: Report and Recommendations of the American College of Trial Lawyers on the Publication and Citation of Nonbinding Federal Circuit Court Opinions," 208 F.R.D. 645 (2002)
  • “Teaching Through Experts: Changing the Obscure to the Obvious,” Litigation, Spring, 2001
  • “Direct and the Director: Writing, Staging and Telling The Story,” Litigation, Fall, 1998
  • “The Fourth Estate and the Second Front: Winning and Losing in the Press,” Litigation, Spring, 1997
  • “The Strike Zone, the Trial Judge and Other Moving Targets,” California Litigation (California Bar Association Section of Litigation), Spring, 1995

Bar Admissions

  • Pennsylvania
  • United States Court of Appeals for the Federal Circuit
  • United States Court of Appeals for the Third Circuit
  • United States District Court for the District of Maryland
  • United States District Court for the Eastern District of Pennsylvania
  • United States District Court for the Middle District of Pennsylvania

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