Heilferty attended Boston University, where she played for the Boston University Terriers women's soccer team. She made 62 appearances, and scored 13 goals and 10 assists.[2] The Patriot League named her its rookie of the year in 2017, and in 2018 named her the Patriot League Tournament's most valuable player and to the All-Patriot League first team.[1][4] Initially playing as an attacker and leading the team in goals and assists as a sophomore, she moved to left back in her junior year.[5]
Club career
Heilferty, a fan of the Washington Spirit as a child, trained with the team during the COVID-19 pandemic in 2020. The Spirit selected Heilferty with the 19th-overall pick in the 2021 NWSL Draft.[2] She was the first Boston University player to be drafted into the NWSL.[6]
On January 17, 2023, the Spirit extended Heilferty's contract through 2024 with an option for an additional year. The team also officially converted her to a defender.[5][9] On February 25, 2023, the Spirit announced that Heilferty would miss the 2023 season due to an anterior cruciate ligament injury suffered during preseason.[10][11]
Heilferty made her return to the pitch on March 23, 2024, in the Spirit's 2024 home opener match against Bay FC.[12] In her second match back from injury, Heilferty suffered a season-ending ACL tear on April 26, 2024.[13] It would be Heilferty's second ACL injury in just over a year.[14]