Patricia J. Cooney, Esq., is a partner at Segal, Berk, Gaines & Liss. She has been with the firm for over forty years, successfully litigating hundreds of civil cases, including Jury Trials, Non-Jury Trials, Arbitrations, and Mediation Hearings in both Federal and State courts.
Ms. Cooney has also done appellate work before the Pennsylvania Supreme Court, Pennsylvania Superior Court, Commonwealth Court of Pennsylvania, and the Federal Third Circuit Court of Appeals. In addition, she practices in the area of Workers’ Compensation, representing injured workers and Social Security Disability matters.
Ms. Cooney has also successfully negotiated settlements in personal injury cases as well as workers’ compensation matters, including Compromise and Release Agreements for injured workers.
Ms. Cooney practices in the Federal and State Courts in Philadelphia County as well as all of the surrounding suburban counties, including Bucks, Chester, Delaware, and Montgomery.
Ms. Cooney received her B.A. in Political Science from Widener University and went on to become a graduate of Delaware Law School of Widener University.
Prior to joining Segal, Berk, Gaines & Liss, Ms. Cooney clerked for Judge William R. Toal, Jr., of the Delaware County Court of Common Pleas. She was also elected as the Councilwoman for the Borough of Prospect Park, Delaware County, PA, serving as the Chairman of the Police and Fire Committee as well as the Building, Planning, and Zoning Committee.
Ms. Cooney is a member of the Pennsylvania Bar Association, Philadelphia Bar Association, Delaware County Bar Association, and she is an active member of the Workers’ Compensation Section and State Civil Litigation Section of the Philadelphia Bar Association.
She was also a member of the Attorney Volunteers of the World Meeting of Families and Saint Joseph’s University. Ms. Cooney was the attorney volunteer for the City Year Philadelphia AmeriCorps Career Day Program.
She is also a Lead Singer in a local a cappella group that performs for various charity functions and community events, and whose group placed second in the Small Chorus category in the Regional State Competition held in 2025.
About Derek Liss, Esq.
Derek Liss, Esq., is a partner at Segal, Berk, Gaines & Liss, specializing in personal injury law.
Derek earned his Bachelor of Arts in Political Science from The George Washington University in 1991 and his Juris Doctor from Widener School of Law in 1994. He joined Segal, Berk, Gaines & Liss immediately after law school and brings 30 years of legal experience to his clients.
A member of the Philadelphia Bar Association, he practices throughout the greater Philadelphia region and is admitted to practice in the courts of Pennsylvania and the U.S. District Court for the Eastern District of Pennsylvania.
