Upon returning to the place of his mother's residence at Poprad, Burger found out that, although exempt from deportation by Slovak law, she and his Christian stepfather had only months earlier been deported and killed. The application of the law changed when the German military took control of his country after the failed uprising of 1944. He then settled in Prague where he reconfirmed his membership in the Communist Party, which he joined in 1933, was made director of a consortium of printing houses, remarried, and had three children. He was harassed by the secret police during the Communist purges of the early 1950s. He later worked in a shipyard, headed a department in Prague's municipal services, and became director of the city-sponsored taxicabs.