Ulla Thielemann and the West German female field hockey team won the silver medal at the 1984 Los Angeles Olympics round-robin tournament, finishing with six points. She was European Champion in 1981, European Indoor Champion in 1985, and also won the bronze medal at the 1984 Europeans. She won 36 international caps (including 11 indoor) between 1980-87.
Domestically, Thielemann played with 1. Hanauer THC and helped them to win the German Championship in 1981 and 1984, and the Indoor title in 1983. She later married a swimmer and worked with Lufthansa as a graduated computer scientist.