Mackenzie Olden linked up with Cardiff City FC Women in July 2023. 

The striker previously had experience of playing in the Adran Premier with Barry Town United. 

Olden made her competitive debut for the Bluebirds in the UEFA Women's Champions League against FC Gintra in September 2023.

Her first goals for the Club came with a brace against Llanelli Town in the Bute Energy Welsh Cup in the following month. 

Following a long-term ACL injury, Olden scored in a 4-1 win over Barry Town United in her first start since completing her recovery.

The 2024/25 season culminated in the attacker playing her part in an Adran Premier and Bute Energy Welsh Cup double.