At youth level she played soccer for Forth Celtic, as well as camogie and Gaelic football for the local St Martin's GAA club.
In the final at the Aviva Stadium Rossiter's injury time equaliser helped them prevail over Shelbourne, 4–2 on penalties after a 2–2 draw.
[8] In March 2018 Rossiter made a Wexford Youths comeback under the Ferrycarrig Park club's new manager Tom Elmes, only to be stretchered off again during their opening day 5–0 win over Limerick.
[10] Rossiter played for Ireland at schoolgirl level in the 2010–11 season, while attending Presentation School in Wexford.
National coach Susan Ronan had noted her impressive performances for Wexford Youths' FAI Women's Cup-winning team.