In December 2021, McNamara made her A-League Women debut for Melbourne City in a 1–0 win over Canberra United, starting the match and playing the full 90 minutes, along with scoring the game's only goal.
[4] In February, McNamara suffered a ruptured anterior cruciate ligament injury in a match against Sydney FC, which ended her debut season.
[5] In 2018, McNamara was a part of the Junior Matildas team ahead of their 2019 AFC U-16 Women's Championship qualification campaign, however she tore her ACL before she had the chance to make her debut for the side.
[6] After an impactful first five games for Melbourne City FC in the A-League Women, McNamara was called up by the Matildas for the first time.
[8] McNamara was recalled to the Matildas squad on 18 November 2023 for two international friendly matches against Canada to be played in December.