Beate Deininger 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 won 56 international caps (including 10 indoor) between 1982-88. She was also European Indoor Champion 1985 and 1987 and won the bronze medal at the 1984 Europeans.
Domestically, Deininger played with Eintracht Frankfurt. In 1991 she helped Frankfurt win the German Championship. Since 1984 she has been working as an educator in the municipal day-care center in Niederrad near Frankfurt. She was also active as a field hockey coach with her home club Eintracht Frankfurt.