 Hans-Joachim HaJo Geisler akaberekwa 27 May 1955 ari pamudyandigere wokuGermany uyo akahwina menduru yegoridhe nebronze pa 1975 World Aquatics Championships. Akakwikwidzawo mumitambo yeOlympic ya1972 na1976. Muna 1972 chikwata chake chakapedza chiri pachinhanho chechina mumakwikwi e4 × 200 m freestyle relay, 0.15 seconds shoma kuti vawane menduru yebronze. Pakati pa1973 na1978 akahwina mikombe misere yenyika, kusanganisira mitanhatu mumakwikwi e400 m ega ega. 