Uli Hänel was a member of the West German male field hockey teams that won silver medals at the 1984 Los Angeles and 1988 Seoul Olympics. In 1984 the team lost the final 2-1 against Pakistan after extra time, and in 1988 Great Britain won the gold medal after winning 3-1. Hänel won 154 international caps (including six indoor) between 1978-89. He was European Champion in 1978, and also won the silver medal at the 1982 Worlds, and bronze medals at the 1986 Worlds and 1987 Europeans, and also won the Champions Trophy 1986-88.
Domestically, Hänel played with Rot-Weiss Köln, helping them to win the West German Indoor title in 1978 and 1986. His brother Rüdiger coached the female national team that won the silver medal at the 1992 Barcelona Olympics.