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John A. Greenhall

Partner   |   Philadelphia, Pittsburgh
Partner   |   Philadelphia, Pittsburgh

JOHN A. GREENHALL is the Secretary of Cohen Seglias Pallas Greenhall & Furman PC as well as a Shareholder and member of the Board of Directors. In addition, he is a Partner in the Firm’s Construction Group. John has been with the Firm since its inception, starting as the sole associate. He served as Managing Partner from 2000 through the end of 2010.

John’s clients hail from all areas of the construction industry and include general contractors, subcontractors, architects, engineers, sureties and owners. He has handled cases on both the state and federal levels in a multitude of jurisdictions, including Pennsylvania, New Jersey, New York, Maryland, Virginia, Illinois, Indiana, Minnesota, Florida and West Virginia. He has argued cases on the appellate levels in Pennsylvania, New Jersey, West Virginia and Minnesota. John is also a proponent of alternative dispute resolution (ADR) processes including mediation, arbitration and "mini-trials". He has arbitrated numerous construction disputes and has been selected to serve on the commercial arbitration panel of the American Arbitration Association. He has also mediated in dozens of cases in this arena. He is adept in negotiating contracts and responding to questions that arise during the construction process. In addition, John has developed a growing E-discovery practice.

John has served as general counsel to the Delaware Valley Association of Structural Engineers. He has frequently lectured and written on topics that include construction claim documentation, contracts, suretyship, indemnity agreements, alternate dispute resolution and construction delay claims.


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  • John has achieved an AV® Preeminent™ Peer Review Rating for professional ethical standards and legal ability by Martindale-Hubbell. Martindale-Hubbell Ratings provides reviews of lawyers and law firms for consumers and professionals.
  • John has named to the Best Lawyers® in America list in the field of Construction - Law every year since 2015. Based on exhaustive peer-reviews, Best Lawyers is regarded as the most reliable, unbiased source of legal referrals.
  • John has been listed in the Pennsylvania Super Lawyers list in the field of Construction Litigation every year since 2011, and from 2004-2008. Super Lawyers, a Thomson Reuters business, is a rating service of outstanding lawyers from more than 70 practice areas who have attained a high degree of peer recognition and professional achievement. Each year, no more than five percent of the lawyers in the state are selected to receive this honor.
  • John was also named a Super Lawyer in the 2009 Corporate Counsel Edition for Construction Law.
  • From 2005 - 2007, John was selected to the New Jersey Super Lawyers list. 


The George Washington University Law School, J.D.
Franklin & Marshall College, B.A.

Bar Admissions

New Jersey
New York

Court Admissions

U.S. District Court, Eastern District of Pennsylvania
U.S. District Court, Middle District of Pennsylvania
U.S. District Court, Western District of Pennsylvania
U.S. District Court, District of New Jersey
U.S. Court of Appeals, Third Circuit
Best Lawyers Award Badge