About William Joseph
William Joseph Coppol built his path to law on a foundation in finance. He earned a Bachelor of Science in Finance from West Virginia University in 1995. Four years later he completed his legal studies at Widener University School of Law, receiving his J.D. in 1999.
After law school, Coppol entered the Pennsylvania legal market. He became licensed to practice in the state and began handling the typical demands of a busy bar—research, client counseling and courtroom work. Early years in practice often require adaptability and steady attention to procedure. Coppol’s academic background in finance has informed how he approaches complex factual records and client transactions.
Over time he took on a range of matters that reflected the needs of the communities he served. He has experience drafting pleadings, negotiating agreements and presenting arguments in court. His work has involved both written advocacy and in-person representation. Colleagues describe him as methodical in preparation and clear in his courtroom presentations.
Coppol later joined Mattiacci Law, LLC. He practices from that firm’s office in Pennsylvania. At Mattiacci Law he works alongside other lawyers and staff handling client files from intake through resolution. The firm environment has meant balancing individual client needs with the administrative demands of a modern practice. Coppol’s background in finance continues to be useful when cases involve monetary analysis or settlement discussions.
Professional development has been a steady part of his career. Keeping up with changes in state rules and procedural updates is part of everyday practice in Pennsylvania. Coppol has navigated those changes while maintaining a steady case load. He is known for thorough file management and for preparing materials that assist judges, opposing counsel and clients to see the core issues clearly.
Outside of court appearances, Coppol spends time advising clients on options and likely outcomes. He helps clients weigh settlement versus trial and prepares them for what each path will require. He also manages document-intensive matters where timelines and detail are important.
As of 2026 he remains an active practitioner at Mattiacci Law, LLC. He focuses his current practice on providing legal services to clients in Pennsylvania from the Mattiacci Law, LLC office.
