Margaret C. O'Neill

Ms. O'Neill is a partner in the firm’s Philadelphia office.  She represents clients in complex litigation matters in state and federal court nationwide, frequently in mass tort and multi-district litigation proceedings. Ms. O’Neill focuses her practice on product liability defense in cases involving pharmaceuticals and medical devices, and material handling equipment.  Before joining the firm, Ms. O’Neill was a commercial litigator at Hangley Aronchick Segal Pudlin & Schiller in Philadelphia, where she represented insurers in sophisticated coverage, bad faith, and reinsurance disputes across all coverage lines.

While studying at the University of Pennsylvania Law School, Ms. O’Neill earned a certificate in Business & Public Policy from the Wharton School of the University of Pennsylvania, and as a junior lawyer, she was selected to be seconded to the litigation department of a Fortune 500 energy company. These experiences have helped Ms. O’Neill to gain a unique perspective of the diverse needs of her large corporate clients, which she incorporates in anticipating their needs and serving their interests.


Professional Affiliations

  • DRI Drug & Medical Device Committee, Online Community Chair
  • University of Pennsylvania Law School Inn of Court


Community Service

  • Support Center for Child Advocates, Pro Bono Child Advocate Attorney (2010-present)
  • Friends of Cristo Rey Philadelphia High School, Board Member (2014-present)