Born in Boston and raised in Dedham, Justice Marguerite T. Grant graduated from Wellesley College with a degree in History and Latin and earned her Juris Doctorate from Stanford Law School where she was managing editor of the Stanford Law Review.
Justice Grant began her legal career in 1988 as a Litigation Associate at Hill and Barlow, P.C. in Boston. In 1991, Justice Grant joined the Middlesex County District Attorney's Office, where she served as an Assistant District Attorney for 20 years. In addition to her work as an ADA, Justice Grant also served as a Lecturer in Legal Writing for Harvard Extension School from 1992 until 1997, and as an Adjunct Professor in Appellate Advocacy for Northeastern University School of Law from 2002 until 2005. In 2011, she joined the Norfolk County District Attorney's Office as an Assistant District Attorney, before her promotion in 2014 to her most recent role as General Counsel and Director of Training. In this role, Justice Grant advised the District Attorney on legal and ethical issues, trained prosecutors on legal and ethical obligations, and argued primarily homicide and sexual assault cases in the Commonwealth's appellate courts. She also served as an Adjunct Professor in Professional Responsibility at Suffolk University Law School.
Justice Grant has been a member of the Board of Trustees of the Massachusetts Bar Foundation since 2007, and was previously a member of the Board of Bar Overseers, serving as Chair from 2007 until 2008. She has also served on the Board of Editors of Massachusetts Lawyers Weekly since 2016. Justice Grant has been a member of the Supreme Judicial Court's Standing Advisory Committee on Massachusetts Rules of Criminal Procedure since 2019 and was named one of the "Top Women of Law" by Massachusetts Lawyers Weekly in 2019.
Justice Grant was appointed to the Appeals Court bench by Governor Charles Baker in October, 2020.