Grace Olsen first joined Cardiff City FC Women at U19 level, signing in July 2024.

Making the move from Cardiff Wanderers, the goalkeeper impressed for Tom Stiley's side, before making her Senior Team debut in November 2024 in a 4-1 win at Cardiff Metropolitan University.

The end of the 2024/25 campaign saw Olsen play a starring role in an U19 National Play-Off Final against Wrexham, proving to be the difference between the two sides in a penalty shootout.

The City shot-stopper signed an amateur contract in June 2025.