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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 at 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.


News & Publications

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  • Martindale-Hubbell AV® Preeminent™ Peer Review Rated
  • Best Lawyers® in America List, Construction - Law: 2015 - 2018
  • Pennsylvania Super Lawyers List, Construction Litigation: 2004 - 2008, 2011 - 2018
  • Corporate Counsel Edition for Construction Law Super Lawyer List, 2009
  • New Jersey Super Lawyers List: 2005 - 2007


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