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Justin N. Leonelli

Fax +1.412.355.6501
Justin N. Leonelli is an associate in the firm’s Pittsburgh office. As a member of the construction and infrastructure practice group, Mr. Leonelli represents owners, general contractors, subcontractors, suppliers, and design professionals in a variety of public and private construction disputes nationwide. He frequently handles matters involving defective construction claims, delay claims, differing site conditions claims, mechanic’s lien claims, and bonding disputes. Mr. Leonelli also represents clients in connection with public procurement issues and assists in negotiating and drafting contracts for a range of construction professionals. In addition, Mr. Leonelli has significant experience representing entities in the energy industry, including natural gas exploration companies and coal burning facilities, in lawsuits arising from their operations.

In addition to his legal practice, Mr. Leonelli is actively involved in the Pittsburgh community. He serves on the board of directors for a non-profit organization focused on providing apprenticeship programs for individuals seeking employment in the manufacturing industry. He also serves on the firm’s associates’ committee for the Pittsburgh office.

Professional Background

Prior to joining the firm, Mr. Leonelli was a litigation associate at a Pittsburgh-based law firm where he focused his practice on commercial disputes and handled matters involving the construction, energy, and manufacturing industries. In addition, he was a legal intern for the nation’s largest provider of shared communications infrastructure, Crown Castle. Mr. Leonelli also served as an extern to the now-Pennsylvania Supreme Court Justice David. N. Wecht.


  • Allegheny County Council Proclamation
  • CALI Excellence for the Future Award, Legal Research & Writing
  • CALI Excellence for the Future Award, Advanced Legal Writing: Writing in Law Practice
  • Best Appellate Brief in Academic Mock Appeal

Professional/Civic Activities

  • New Century Careers, Director
  • Allegheny County Bar Association — Construction Section, Member
  • Allegheny County Bar Association — Young Lawyers Division, Member

Speaking Engagements

  • Instant Communication and Advances in Technology: Exchanging Ethical Dilemmas and Increased Expectations for Convenience and Efficiency, Dean John J. Sciullo Fundamentals of Law Continuing Education Series (April 25, 2015).
Additional Publications
  • Amendments to Federal Rule of Evidence 902, The Legal Intelligencer, 1 November 2017
  • Dormant Commerce Clause Review of a Lifecycle Analysis Regulation: Rocky Mountain Farmers Union v. Corey, 3 Joule Energy & Envtl. L.J. 2, 11 November 2014

Additional Information

Mr. Leonelli grew up in Youngstown, Ohio where he attended Cardinal Mooney High School. He now resides in a northern suburb of Pittsburgh. In his spare time, Mr. Leonelli likes to golf and visit with family and friends.
  • Represent national meal delivery start-up in multi-million dollar dispute related to the construction of its east coast food processing facility. This matter is ongoing and implicates numerous mechanic’s lien claims, nearly a dozen change order disputes, and various defective construction claims.
  • Represent international manufacturer of advanced thermal technology in multi-million dollar dispute alleging claims of defective supply related to the construction of a natural gas-fueled generating facility.
  • Represent international engineering firm in multi-million dollar lawsuit alleging claims of negligent misrepresentation related to its design of a municipal ash recycling and processing facility.
  • Defended municipality in multi-million dollar lawsuit involving claims for defective construction and differing site conditions related to the construction of a township’s subsurface sewer system.
  • Defended national petroleum and natural gas exploration company in multi-million dollar lawsuit involving various claims related to the subsurface contamination of protected forestland.
  • Defended owner of a nuclear and coal-fired power plant in lawsuit brought by coal mine alleging, among other claims, breach of a long-term coal supply agreement and claiming damages in the hundreds of millions.
  • Defended owner of nation’s most efficient and cleanest coal-fired power plant in lawsuit brought by coal mine alleging breach of a long-term coal supply agreement.
  • Represented regional energy and infrastructure maintenance provider in lawsuit against competing business alleging claims for trade secret infringement and unfair competition.
  • Represented conglomerate of entities in intracompany deadlock over financing for a multi-million dollar luxury apartment complex.