Mundy was born on June 29, 1962, in Elmira, New York. She received a bachelor's degree from Washington and Jefferson College in 1984 and a law degree from the University of Pittsburgh in 1987. Mundy began her legal career as a law clerk for Judge Robert M. Kemp in Tioga County, Pennsylvania "Tioga County, Pennsylvania (Judicial)") from 1987 to 1988. From 1988 to 2009, Mundy worked at several law firms and law offices in State College, Bala Cynwyd, and Philadelphia, Pennsylvania. From 2008 to 2009, she was a volunteer public defender in Tioga County, Pennsylvania. In 2009, Mundy was elected to the Pennsylvania Superior Court, where she remained until Gov. Tom Wolf appointed her to the Pennsylvania Supreme Court in 2016. She won election to a full, ten-year term on the supreme court in 2017.
