Munley received a Bachelor of Arts from Marywood University in 1987 and a Juris Doctor from the Penn State Dickinson Law in 1992.

[4] From 1992 to 1993, Munley served as a law clerk to Judge Stephen J. McEwen of the Pennsylvania Superior Court.

From 2016 to 2023, she served as a judge on the Court of Common Pleas of Lackawanna County in Pennsylvania's 45th Judicial District.

President Biden nominated Munley to the seat vacated by Judge Robert D. Mariani, who assumed senior status on September 30, 2022.

[16] Her paternal grandmother was Marion L. Munley, one of the first women elected to the Pennsylvania House of Representatives.