Michael J. Lonergan, III

Michael J. Lonergan, III

Office:Wilmington, DE
Phone:(302) 404-4786

Michael J. Lonergan III joined Margolis Edelstein as an associate in 2020. He focuses his practice on general and professional liability litigation in state and federal courts. Michael has experience in commercial litigation and contract disputes.

Through his practice, he represents professionals, business owners, corporate officers, and property owners, defending them in complex lawsuits involving personal injury, products liability, and commercial disputes. In additional, Michael represents both the seller and buyer in commercial and residential real estate transactions and real estate contract disputes.

Michael represents general and subcontractors, suppliers, and manufacturers throughout PA against disputes arising from asbestos exposure.

Prior to joining the firm, Michael externed at the Wilmington Office of the U.S. Trustee, a component of the US Justice Department responsible for overseeing the administration of bankruptcy cases and private trustees. During that time, Michael assisted U.S. trial attorneys in complex Chapter 11 filings and contentious motions. In addition, Michael was a summer associate at a large law firm where he was a member of a trial defense team which successfully defended an international social club against a $27 million verdict.

Michael earned his Juris Doctor from Delaware Law School and his Bachelor of Arts in History at West Chester University.


  • Delaware Law School, J.D.
  • West Chester University, B.A.

Bar Admissions:

  • Pennsylvania