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.

As a junior lawyer, she was selected to be seconded to the litigation department of a Fortune 500 energy company. As a result of her diverse background, Ms. O’Neill has a unique perspective on the various needs of her large corporate clients and works effectively to anticipate their legal challenges.


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)