[2][3] After attending an open tryout and impressing in preseason matches, Simon was signed by Sky Blue FC in April 2016.

[6] On September 14, 2018, Simon joined West Ham United ahead of the London club's debut season in the FA WSL.

[8] On January 24, 2020, Simon left West Ham to return to the NWSL, signing with Houston Dash.

[14] On July 7, 2023, Simon announced her retirement from professional football in order to focus on her mental health.

[15] In October 2022, the Yates Report was released, and detailed that her former coach at Sky Blue FC and Racing Louisville, Christy Holly, had sexually abused her multiple times.