Born in St. Leonards, Australia, the forward began her career with Manly United and Sydney FC before venturing abroad in 2018 following a move to the United States with California Storm.
She scored nine goals in eight league appearances during her time in the States before returning home to join Western Sydney Wanderers and subsequently Sydney FC for a second term.
The striker has amassed over 150 appearances in her career to-date, with her recent experience including a spell in Sweden’s top-flight with AIK, where she made 21 appearances during the 2022 Damallsvenskan season.
Internationally, she made her debut for Australia against Brazil in October 2021 and has since made four further appearances for the Matildas on the world stage.
After her arrival to the Foxes, Siemsen made her first appearance against Manchester United at Leigh Sports Village, where she scored her first goal for the Club, with a second half volley from inside the box.