Philadelphia
Located just blocks away from iconic City Hall, Marshall Dennehey is proud to call Philadelphia home. The growth and entrepreneurial spirit of our firm is paralleled by the innovative business spirit of Philadelphia, the epicenter of many life sciences, legal, energy, manufacturing, technology, financial, and biomedical and pharmaceutical enterprises.
The attorneys in our Philadelphia headquarters office represent a vast array of clients in civil litigation across virtually every practice area of the firm. We are leaders in the Philadelphia and Pennsylvania Bar Associations, the Philadelphia Association of Defense Counsel, the Lawyers’ Club of Philadelphia, the Insurance Society of Philadelphia and dozens of other regional, statewide and national legal and defense organizations.
We are deeply dedicated to the social, business, and charitable aspects of the Philadelphia metropolitan community and provide annual financial support to the United Way, the Philadelphia Bar Foundation, the Philadelphia Support Center for Child Advocates, and many other regional causes.
We invite you to visit us in Philadelphia, or in any of our 19 offices, where you will find an inclusive and winning corporate culture–we have been voted a “Best Places to Work” by the Philadelphia Business Journal for 14 consecutive years–and outstanding attorneys devoted to providing you with excellence in legal services.
Thought Leadership
Results
Federal Statute Declared Constitutional
In this products liability case, the Supreme Court of Pennsylvania reversed the Superior Court and upheld the constitutionality of the Protection of Lawful Commerce in Arms Act (PLCAA), which resulted in judgment as a matter of law for the defendant manufacturer.
Statutory Employer Immunity Upheld
In this construction accident case that resulted in a $5 million verdict, the Supreme Court of Pennsylvania upheld the Statutory Employer Doctrine, which immunizes general contractors and other contractors on construction sites when certain elements are satisfied.
News
Global Leadership Expert India Gary-Martin Speaks at Marshall Dennehey’s Annual DE&I Attorney Meeting
September 18, 2026

106 Marshall Dennehey Attorneys Recognized in the 2027 Editions of The Best Lawyers in America® and the Best Lawyers: Ones to Watch® in America
August 20, 2026
Marshall Dennehey Names Carolyn Schweizer New Philadelphia Office Managing Attorney
July 8, 2026
