The attacking midfielder has joined from Manchester City, where she made 119 appearances and scored 22 goals, since 2017, in addition to a loan spell at Everton.
She has 20 caps and three goals for England, and was part of the team that won the European Championship in 2025.
Jess Park said: “I am really happy to be here and can’t wait to get started. I wanted to break out of the boundaries and push myself to take on a new challenge. I’m the sort of person who wants to keep improving and pushing limits, and I think this is the perfect place for me to do that.