Mark T. Caloyer


Mark Caloyer is a partner in the Pittsburgh office of Lewis Brisbois and member of the General Liability and Transportation Practices. Mr. Caloyer has extensive experience in litigating product liability, construction defect and construction zone accident cases. He has tried cases to verdict in federal and state court involving personal injury, commercial torts, and insurance coverage. Mark has also handled complex cases including allegations of water contamination on behalf of a supplier to a natural gas drilling site, commercial defamation, premises liability, and asbestos exposure.

Mr. Caloyer has also represented contractors in the initial investigation and defense of construction zone accident cases and has represented general contractors, subcontractors, owners and architects in construction cases and arbitrations. He has also lectured on insurance bad faith for continuing legal education.

A life-long resident of Pittsburgh, Mr. Caloyer has worked to obtain guardianships for parents of disabled adults. He is a graduate of Duquesne University School of Law and received a bachelor of science degree from Carnegie Mellon University.

Published Opinions

  • Company Wrench v. Highway Equipment Co.
  • Kalumetals, Inc. v. Hitachi Magnetics Corp., 21 F. Supp. 2d 510 (W.D. Pa. 1998)
  • Aiken v. Borough of Blawnox, 747 A.2d 1282 (Pa. Cmwlth. 2000)
  • Burger v. Borough of Ingram, 677 A.2d 1037 (Pa. Cmwlth. 1997)
  • Foster v. Herion USA, Inc., 151 PLJ 162 (C.P. Alleg. Co. 2003)


Legal Issues in the Investigation of a Party's Social Media, Breaking Ground Magazine, Master Builders Association of Western Pennsylvania, November/December 2016

Pro Bono & Philanthropy

Pittsburgh Pro Bono Partnership, Neighborhood Legal Services Guardianship Program

Professional Presentations

  • Insurance Bad Faith Claims in Pennsylvania, Lorman Education Series, June 25, 2002
  • Insurance Bad Faith Claims in Pennsylvania, Lorman Education Series, June 15, 2015


  • State Bar Admissions
    • Pennsylvania
  • United States District Courts
    • United States District Court for the Western District of Pennsylvania
  • United States Courts of Appeals
    • United States Court of Appeals for the Third Circuit



U.S. District Court for the Western District of Pennsylvania

U.S. Court of Appeals for the Third Circuit


  • Pennsylvania Bar Association
  • Allegheny County Bar Association

Awards & Honors

Martindale-Hubbell AV rating


Duquesne University School of Law

Juris Doctor

Carnegie Mellon University

Bachelor of Science

Representative Matters

  • Obtained summary judgment for geo-membrane manufacturer on product liability claim brought by neighboring land owners of gas well impoundment.
  • Obtained summary judgment for prior owner of manufacturing facility for amputation injury to machine operator.
  • Defense verdict for commercial entity in business defamation case in federal court.
  • Verdict on behalf of commercial plaintiff against paving company for defective private road.
  • Verdict in federal court on behalf of insurer in declaratory judgment action. Verdict in favor of masonry contractor in defective construction case.
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