Born in Neuruppin, Hohn excelled at the javelin throw from a young age and won the 1981 European Junior Championship with a throw of 86.56 m, a junior record. He then won gold at the 1982 European Championships with a 91.34 m throw. He did not compete at the 1983 World Championships and missed out on the 1984 Summer Olympics as East Germany had boycotted the games. He did however win gold at the Friendship Games, throwing 94.44 m (Arto Härkönen won the 1984 Olympics with a throw of 86.76 m). In 1985, Hohn won the IAAF World Cup and European Cup but his career ended in 1986 after several setbacks due to a surgery.