Early in his career, Vosátka competed in partnership with Blažena Knittlová. They were awarded the silver medal at the 1948 European Championships in Prague. The pair withdrew from the 1948 Winter Olympics in St. Moritz. Their partnership ended in 1953. Vosátka teamed up with Věra Vajsábelová and then Hana Dvořáková. Dvořáková/Vosátka competed at five European Championships, achieving their best result, 5th, in 1960. He retired from competition in 1961, following the crash of Sabena Flight 548 and cancellation of the World Championships in Prague.