Forster joined the coaching staff ahead of the 2022 season as a volunteer assistant coach. 

Forster is currently the Director of Coaching for the Arlington Soccer Club, where she oversees the development of all youth soccer players and volunteer soccer coaches. Forster, who graduated from Anglia Ruskin University in the United Kingdom with a Coaching for Performance in Football degree, earned her USSF "B" license in April 2021 as well as a Director of Coaching diploma from the NSCAA. Additionally, she works with Massachusetts Youth Soccer as a coach educator to help deliver coaching licenses and courses. Forster has also worked as a coach for the Steven Gerrard Academy in Liverpool, Challenger Sports in Massachusetts and for Liverpool FC.

Forster also has experience playing professionally, including for Fylde Women FC in the FA Women's National League, the Rhode Island Rogues in the WPSL and the Preston North End FC and Liverpool FC squads in the Women's English Premier League. She was a captain of the Liverpool FC Under-21 squad for two seasons.