Sean M. Hamill

Sean M. Hamill is a litigation lawyer who focuses on personal injury, wrongful death, medical malpractice, contract disputes, real estate and land use, and probate litigation. He represents both plaintiffs and defendants, giving him a balanced perspective in complex disputes. His practice also includes legal malpractice and insurance defense. He helps clients navigate serious claims with careful preparation, strong advocacy, and strategies designed to achieve favorable outcomes in and out of court.

Sean earned his J.D., magna cum laude, from Quinnipiac University School of Law, where he served on the Editorial Board of the Quinnipiac Law Review. He also received his B.A. from Connecticut College. His education gave him a strong foundation in legal analysis, writing, and advocacy. That background supports his work in complex litigation and helps him present clear, effective arguments in matters involving serious injuries, probate disputes, and civil claims.

Throughout his career, Sean has handled courtroom litigation as well as alternative dispute resolution, including arbitration and mediation. His experience on both sides of litigation gives him insight into how complex cases are evaluated, defended, and resolved. He has recovered millions of dollars for severely injured clients through meticulous preparation and determined advocacy. Clients benefit from his ability to assess risk, develop strong strategies, and pursue practical solutions in high stakes matters.

Sean M. Hamill is admitted to practice in Connecticut and before the U.S. District Court for the District of Connecticut. He is also active in professional organizations, including the Connecticut Bar Association, Connecticut Trial Lawyers Association, and Greenwich Bar Association. Clients value his disciplined approach, clear communication, and broad litigation experience. He remains focused on helping individuals and families protect their rights and pursue fair results in challenging personal injury, probate, and civil disputes.

Law Office Affiliations

• Partner, Mandelbaum Barrett PC
• Member, Connecticut Trial Lawyers Association
• Member, Connecticut Bar Association
• Member, Greenwich Bar Association

Licensed State

• Connecticut

Education

• Quinnipiac University School of Law
  Juris Doctor (JD)
• Connecticut College
  Bachelor of Arts (BA)

Awards & Badges