[5] Ziemer started her youth career with local side Santa Rosa United playing predominantly as a forward and on occasion in midfield.
She represented the Cavaliers 45 times over two seasons,[1] registering 12 goals and 8 assists before joining ADO Den Haag in the Netherlands to play professionally.
Ziemer agreed to join Breiðablik in the Úrvalsdeild kvenna, the top women's football league in Iceland.
[11] She played in the 2021–22 UEFA Women's Champions League where Breiðablik were drawn in Group B against Paris Saint-Germain, Real Madrid and Zhytlobud-1 Kharkiv.
[13] Going into the 2022–23 UEFA Women's Champions League season, Breiðablik were knocked out in the qualifying stages against Rosenborg on aggregate, with Ziemer playing in both legs.
[19] Ziemer featured in the February 2019 edition of the ADO Den Haag Post where she discussed her journey from The U.S to The Netherlands in an interview alongside fellow American Johnny Reynolds.