Sophie played for Brighton & Hove Albion before joining Chelsea in 2005. She spent seven seasons at the club, having spells at Milwall and Brighton on loan, before rejoining Brighton permanently in August 2014. She won the Premier League Southern Division play-offs with the club in May 2016.

Sophie has been capped by the Republic of Ireland and ahead of the matches against Finland and Montenegro in June 2016, she has 28 caps to her name.