Justine Grace-McCarthy was born in Boston and raised in Milton, MA. Justine attended Fontbonne Academy in Milton where she was a 3-sport student athlete, playing soccer, basketball and track & field. She was an All-Scholastic in basketball her senior year and went on to play Division I basketball at The College of the Holy Cross in Worcester, MA. Justine graduated in 2001 with a degree in Psychology. She began her coaching career at her alma mater Fontbonne Academy as an assistant coach.
In 2004 Justine took a break from coaching to pursue a Master's degree at Boston University. In 2006 she graduated with a Master's in Mental Health & Behavioral Medicine with a specialization in Sports Psychology. Justine worked in the mental health field for a couple of years as she pursued her professional license in counseling. In 2008 Justine started working for the Boston Public Schools as a guidance counselor. She worked for English High School for three years and was also the head girls basketball coach. Justine was named Coach of the Year for the 2011-12 and 2012-13 seasons by her peers.
Justine is now a guidance counselor at the McCormack Middle School in Dorchester and is also a Licensed Mental Health Counselor. This is her first year as an assistant coach at Roxbury Community College.