John David O'Neill

John David O’Neill practices multidistrict litigation on behalf of clients affected by toxic exposure, defective medical devices, and vehicle defects and recalls. He also assists with qui tam whistleblower litigation. With a background in engineering, John brings a technical approach to case review and analysis.


John has consulted as an engineer on projects involving manufacturing, transportation, institutional, municipal and residential construction. Prior to attending law school, he was a lead manufacturing engineer with an international aerospace corporation where he was responsible for planning repairs for damaged parts and other components that did not meet specifications. 

John was also a member of the engineering team that performed quality inspections of structural installations on behalf of the S.C. DOT on the Arthur Ravenel Jr. Bridge in Charleston, S.C., one of the longest cable-stayed bridges in North America. John was formerly a South Carolina property attorney, having worked on construction defect claims, negotiated commercial property deals in Charleston, and provided representation in Circuit Court and Municipal Court on criminal and civil matters.

Open Bio


  • J.D., University of South Carolina School of Law, 2013
  • B.S., Clemson University, 2008


  • South Carolina Bar Association
  • American Society of Civil Engineers

Licensed In

  • South Carolina

Admitted to Practice Before

  • U.S. District Court for the District of South Carolina