John G. Bagley

John G. Bagley joins Signature Resolution with a rare combination of trial-tested instinct and a genuine, people-first approach to dispute resolution. A civil trial lawyer who took more than 100 cases to verdict across Massachusetts state and federal courts, and a practice built on both the plaintiff and defense sides of the bar, John enters the mediation room with a grounded command of what litigation actually costs parties, what matters to juries, and what it takes to move a case from conflict to resolution. His breadth across medical malpractice, personal injury, employment, commercial disputes, product and premises liability, and beyond means that attorneys walking in with nearly any civil matter will find a mediator who has handled cases like theirs from the inside.

John’s approach is candid, flexible, and rooted in authentic engagement with everyone in the room. He makes his role clear from the start: he is not there to pass numbers back and forth, but to push all parties toward their best possible outcome. He prepares plaintiffs honestly for the pace and anxiety of the day before it unfolds, and he brings equal candor to insurers when he believes they have undervalued a case. He draws on a deep reservoir of trial experience to anchor parties in the realities of what juries are likely to do, and, when necessary, will use past cases to ground expectations that published verdict reports can distort. When negotiations stall, he deploys a number of approaches to create brackets, asking each side to propose rather than react, surfacing new negotiating space without formal commitment. This kind of fair and flexible engagement with all parties is what has earned John repeat requests to mediate from both plaintiff’s attorneys and defense attorneys alike.

John’s neutral practice is informed by a career of masterful trial work conducted with consistent civility and professionalism toward all parties, courts, and colleagues. He began at Shumway, Giguere and Byrne in Worcester, MA, where younger attorneys were handed first-chair responsibility from day one. He tried 25 civil jury cases before completing his fifth year of practice, building courtroom acumen across a range of matters at the onset of his legal career. His path took him to Egan, Flanagan and Cohen in Springfield, MA, where he tried several significant plaintiff and defense cases and carved out a niche as a medical malpractice defense lawyer. His first medical malpractice verdict, won against long odds in a Boston-area courtroom, launched a lasting relationship with the insurer and led to trying many cases to verdict every year. In 2000, he joined Morrison Mahoney, a Boston firm, where he became one of the firm’s leading trial lawyers for large and complicated cases involving a variety of subject areas, including employment, general liability, and complex civil matters.

His substantive trial expertise and sterling reputation in the broader legal community earned John an invitation and induction into the American College of Trial Lawyers, an organization limited to less than 5% of eligible attorneys, whose rigorous, peer-driven vetting process evaluates not only trial success but ethics and professionalism in equal measure. He is also a member of the prestigious American Board of Trial Advocates and has given his time to many professional organizations. John was appointed by the Massachusetts Supreme Judicial Court to the Clients Security Board, an entity funded by attorneys to award compensation for attorney misuse of client funds. He was also elected president of the Hampden County Bar Association and as Delegate and Committee Chair of the Massachusetts Bar Association. For decades, John has been listed in Best Lawyers in America and has been named a Super Lawyer by Boston Magazine. John served as an editor of Mass Lawyers Weekly and has lectured to lawyers and other professional groups on over thirty occasions.

Now, John’s work at Signature Resolution reflects a career spent understanding what is actually at stake on both sides of a civil dispute. He brings to every session the preparation and persistence of a trial lawyer who has seen cases won and lost, the instincts of a practitioner who has spent years reading rooms and moving people toward closure, and the genuine warmth of someone who never lost sight of the human stakes behind every matter on the table.