About John J.
John J. Sheehan built his legal foundation at Suffolk University Law School, earning his J.D. in 1989. He entered practice soon after and established a record of steady progression through small firm and partner roles. His career spans both trial work and appellate practice in the federal system.
Sheehan began his post-law school practice in the early 1990s as an associate at the Law Offices of Sherwin L. Kantrovitiz, PC. He moved on to Rainer & Rainer in 1996 and joined Shapiro & Associates the following year. Those years in associate roles gave him daily courtroom experience and taught him how to manage case preparation from intake through trial. In 1999 he became a partner at Georgiou & Sheehan. That partnership lasted until he launched his own firm.
In 2007 he founded the Law Office of John J. Sheehan and has served as its managing lawyer since. As founder and manager he handles the administrative responsibilities of running a small practice while remaining actively involved in casework. He has taken matters in state court and before the United States Court of Appeals for the First Circuit, reflecting practice that crosses both state and federal lines.
Professional associations have been a constant in his career. Since 1993 he has held memberships in the American Association for Justice, the American Bar Association, the Massachusetts Academy of Trial Lawyers and the Massachusetts Bar Association. Those memberships indicate ongoing participation in the broader legal community and access to continuing legal education and peer resources.
Colleagues describe Sheehan as a lawyer who focuses on thorough preparation. He favors careful development of factual records and direct advocacy in hearings and trials. His background in multiple small firms and a partnership makes him comfortable handling a full file, from investigation through dispositive motions and trial strategy.
Sheehan is admitted to practice in Massachusetts and before the United States Court of Appeals for the First Circuit. His office work combines case management and courtroom appearances, and his practice has included matters in both state and federal forums. He maintains an active solo practice in Massachusetts and appears occasionally in the First Circuit.
He practices civil litigation in Massachusetts state courts and in the First Circuit, handling matters that require both trial-level advocacy and appellate briefing.
