Casey A. Coyle

Marshall Dennehey announced today that Casey Alan Coyle, a highly accomplished trial and appellate attorney with extensive experience litigating in state and federal trial and appellate courts, has joined the firm’s Harrisburg and Philadelphia offices as a shareholder in the Appellate Advocacy & Post-Trial Practice.

“Having someone with Casey’s command of both commercial and appellate litigation is a tremendous advantage for our clients,” said James H. Cole, Director of Marshall Dennehey’s Professional Liability Department, which includes the Appellate Advocacy & Post-Trial Practice. “His experience strengthens our ability across both practice areas and allows us to further support trial teams through every stage of litigation that may evolve into complex appeals.”

“Casey is widely regarded as one of the most talented appellate advocates in Pennsylvania, with a deep understanding of appellate procedure and a proven ability to deliver results in high-stakes matters,” said John J. Hare, Chair of the firm’s Appellate Advocacy & Post-Trial Practice Group and member of the firm’s Executive Committee. “His extensive experience before Pennsylvania’s appellate courts and his thoughtful, strategic approach to complex legal issues will be invaluable assets to our clients and further strengthen our deep appellate bench at Marshall Dennehey.”

Over the course of his 17-year career, Coyle has developed an active commercial litigation practice, representing businesses in high-stakes, “bet-the-company” disputes in state and federal courts nationwide.  As appellate counsel, he has represented parties and amici curiae in more than 15 appeals before the Supreme Court of Pennsylvania and successfully secured discretionary review, or “allocatur,” from the Supreme Court on six occasions. He has also presented oral argument before the U.S. Court of Appeals for the Sixth Circuit, the Pennsylvania Commonwealth Court, and the Pennsylvania Superior Court.  Before joining private practice, Coyle served as a law clerk to legendary Justice and later Chief Justice Thomas G. Saylor of the Supreme Court of Pennsylvania.

“I’m excited for the opportunity to join the firm’s Professional Liability Department and work with my friend John Hare and his distinguished appellate team,” said Coyle. “I’m eager to jump in and support clients as they work through some of their most challenging cases and issues.” Coyle’s addition comes on the heels of Marshall Dennehey winning Litigation Department of the Year, Appellate at The Legal Intelligencer’s Pennsylvania Legal Awards for the third year in a row.

Coyle is deeply engaged in the legal community and is Chair of the Supreme Court of Pennsylvania’s Civil Procedural Rules Committee, where he assists in the development and administration of the Pennsylvania Rules of Civil Procedure. He is also a Board Member of the Pennsylvania Commonwealth Court Historical Society; Co-Chair of the Pennsylvania Defense Institute’s Amicus Curiae Committee; a member of the Pennsylvania Bar Association’s Appellate Advocacy Committee; and a member of the James S. Bowman American Inn of Court.

He is an elected Fellow of the Foundation of the Federal Bar Association, an honor held by fewer than 300 attorneys nationwide, and is recognized in the 2026 edition of The Best Lawyers in America® for Appellate Practice and Administrative/Regulatory Law. He was also named one of The Legal Intelligencer’s “2024 Lawyers on the Fast Track.”

A graduate of The Pennsylvania State University, Coyle earned his J.D. from Temple University Beasley School of Law. He is admitted to practice in Pennsylvania and New Jersey.

*Marshall Dennehey’s award-winning Appellate Advocacy & Post-Trial Practice Group–recognized by Law.com and The Legal Intelligencer as the Pennsylvania “Litigation Department of the Year” for Appellate Law in 2026, 2025, 2024 and 2016–is one of the largest and most accomplished appellate practice groups in the Commonwealth of Pennsylvania.