Born in Niehmen, Lower Silesia, Vesper competed for the Unified German team in the 1964 Summer Olympics in Tokyo, and then East Germany in 1968 in Mexico City. Both times he competed in the men"s welterweight division of the Greco-Roman wrestling event. Vesper also competed for East Germany in the FILA Wrestling World Championships.
Upon his first appearance, 1963, in Helsingborg, he came in second in the Greco-Roman event.
He competed in the 78kg weight class and the Seniors age group. His second appearance, in 1967, held in Bucharest, also resulted in a silver medal in the Greco-Roman event.
He competed in the Seniors age group and the 78 kg weight class.