Stewart J. Greenleaf, Jr.


Stewart J. Greenleaf, Jr., is a trial and appellate attorney with experience litigating multimillion-dollar complex commercial and business cases spanning diverse areas of law. He also represents clients before governmental and administrative agencies and handles matters requiring commercial arbitration under the American Arbitration Association rules.

Stewart J. Greenleaf, Jr.

Legal Experience That Stands Out

Stewart’s litigation practice includes business torts, contract disputes, healthcare, constitutional claims, data breaches, and insurance coverage and bad faith cases. He represents clients in both the state and federal appellate courts and has successfully defended and overturned multimillion-dollar verdicts on appeal. In November 2011, Stewart was elected to a four-year term as Controller for Montgomery County, Pennsylvania. In that role, he oversaw the county’s $400 million in annual expenditures, as well as its $500 million pension fund.

While earning his J.D. at American University Washington College of Law, Stewart served as president of the university’s chapter of the Federalist Society for Law and Public Policy Studies from 2002 to 2003. After graduation, he clerked for President Judge Emeritus Stephen J. McEwen, Jr., of the Pennsylvania Superior Court.

Stewart represents child victims of abuse with the Montgomery Child Advocacy Project and teaches civics classes to sixth graders in our community schools.  Stewart is a former Director of Legal Aid of Southeastern Pennsylvania, a former Director of the Montgomery Bar Association, and a former President of its Trial Lawyers Section.  Previously, he served for six years as a hearing committee member for the Pennsylvania Supreme Court’s Disciplinary Board. He also served as a member of the Upper Moreland Parks and Recreation Advisory Commission and as a Director of the Upper Moreland Free Public Library.

Representative Matters

  • Co-counsel for the owner of a country club and golf course resort company in a contract dispute against a national builder of residential communities, in which the jury awarded $20 million following a two-week trial.
  • Co-trial counsel for a regional healthcare system in a nursing home wrongful death case alleging corporate negligence and vicarious liability. After a four-week trial in the Philadelphia Court of Common Pleas, Stewart won a nonsuit ruling for the client.
  • Appellate counsel on oral argument preserving a $2 million jury verdict in a medical-device product liability case.
  • Co-counsel in a Pennsylvania Supreme Court case, winning reversal of Superior Court and trial court decisions, resulting in the enforcement of proper contract interpretation principles to reverse a $1.6 million judgment against the firm’s client.
  • Counsel for an Episcopal parish, bishop, and church members in defending against defamation, breach of contract, and tort claims alleged by a former priest. Stewart won summary judgment on constitutional principles and subsequently defended the favorable judgment on appeal before the Pennsylvania Superior Court.
  • Appellate counsel in the U.S. Court of Appeals for the Third Circuit, successfully vacating the trial court’s injunction against the firm’s client.

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  • American University Washington College of Law, J.D., 2004
  • University of Maryland, B.A., 2000
Bar Admissions
  • Pennsylvania
  • New Jersey 
  • U.S. Supreme Court
  • U.S. Court of Appeals, Third Circuit
  • U.S. District Court, Middle District of Pennsylvania
  • U.S. District Court, Eastern District of Pennsylvania
  • U.S. District Court, Western District of Pennsylvania
  • U.S. District Court, District of New Jersey
Honors and Awards
  • Pennsylvania Super Lawyer, 2013 – 2021
  • Super Lawyer, Rising Star, 2008 – 2012