Riedel made her state representative debut in 1982 when selected along with her sister Rita in the South Australian women's lightweight four to contest the Victoria Cup in the Interstate Regatta within the Australian Rowing Championships.

[2] Wearing Adelaide University colours Riedel competed for national titles at the Australian Rowing Championships on numerous occasions.

[4] Riedel made her Australian representative debut in Montreal in 1984 at the first World Rowing Championships that included lightweight events.

The crew performed well taking the silver medal with Riedel and her Australian champion team-mate Amanda Cross in the bow end.

[5] In 1985 Riedel stroked the Australian lightweight coxless four who took the bronze medal at the 1985 World Rowing Championships in Hazewinkel.