John J. Sylvanus


  • University of Pittsburgh School of Law, J.D.
  • University of Delaware, B.A.


  • Pennsylvania
  • United States District Court, Middle District of Pennsylvania
  • United States Appeals Court for the 3rd Circuit
  • Various other state and federal courts pro hac vice
  • U.S. District Court for the Western District of Pennsylvania

Practice Area

Related Industry


  • York County Bar Association
  • Pennsylvania Bar Association

Community Involvement

  • Cultural Alliance of York County, board member
  • York Symphony Orchestra, board member
  • Dallastown Area School District Long Range Planning Committee (2000-2001)
  • York City School Board (1985-1992)

John J. Sylvanus

Of Counsel(717) 852-4988
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John is an attorney in the firm’s Litigation and Construction Law Groups. He is an experienced litigator who counsels clients in construction related matters, with experience in litigation in both state and federal courts, arbitration and mediation and appellate litigation. His practice focuses on defense of professional liability claims against design professionals, commercial litigation, construction contract review and litigation, insurance defense and products liability defense.

John represents architects, engineers, builders, contractors and subcontractors in matters involving contract interpretation and disputes as well as insurance, indemnification and arbitration contract provisions. John also assists his clients with collections, bid challenges, change order and the resolution of construction related liquidated damages claims.

John also maintains an active practice in appellate litigation, successfully representing a variety of industries in the appeals process.