Rooskrantz and teammate Naveen Daries became the first female gymnasts of color to represent South Africa and the Olympics.

She represented South Africa at the 2024 Summer Olympics, where she was the flag bearer of her country along with the male sprinter Akani Simbine.

[3][4] At the 2015 South African Championships, Rooskrantz won gold on uneven bars, silver on balance beam and floor exercise, and bronze in the all-around.

[5] She made her international debut at the 2015 Top Gym Tournament in Belgium, placing ninth in the all-around and sixth on the uneven bars and balance beam.

[8] She nearly swept the gold medals at the 2016 South African Championships but finished second on the balance beam to Naveen Daries.

[14] Rooskrantz began the 2019 season by winning the uneven bars title at the South African Championships.

[18][3] Rooskrantz was one of the first person of colour artistic gymnasts to represent South Africa,[3] along with Naveen Daries, who also competed at the 2020 Olympic Games.

[19] Rooskrantz finished seventh on the uneven bars during the qualification round of the 2020 Baku World Cup.

[21] As the 2020 Summer Olympics were delayed due to the COVID-19 pandemic, Rooskrantz livestreamed the routine that she would have performed at the Games in August 2020.

In the event finals, she won gold on the uneven bars and balance beam and silver on the floor exercise.

[37] She comes from an athletic family: her father played football, and her older brother was involved in field hockey and cricket.