She played college soccer for the Clemson Tigers, where she was named the Atlantic Coast Conference (ACC) Goalkeeper of the Year in 2023.
[2] She played club soccer for Real Colorado, which she helped lead to the DA under-16/17 national championship in 2018, conceding only one goal in six games.
At the end of the 2023 season, she was named Atlantic Coast Conference (ACC) Goalkeeper of the Year, first-team All-ACC, and second-team United Soccer Coaches All-American.
[4][6] Mackiewicz was selected 32nd overall by the Kansas City Current in the third round of the 2024 NWSL Draft but was not signed to the roster while coming back from shoulder surgery.
[7][8] She instead began her professional career in Sweden, signing a one-year contract with Damallsvenskan club Trelleborgs FF [sv] on August 20, 2024.