Koch learned her first triple jumps with coach Ingeburg Walter at the Dresdner EC. Later she was coached by
Ingrid Lehmann in Berlin. She represented the
GDR and her club was SC Einheit Berlin. Koch won the
World Junior Championships in 1983, at the age of 14. In 1984, she was awarded the silver medal at the World Junior Championships, placing behind another East German,
Karin Hendschke. Koch won the silver medal at the 1984 East German Championships behind
Katarina Witt. She placed 4th at the
1985 European Championships. In 1988, Koch won her second silver medal, again behind Witt, at the German Championships. She was sent to the
1988 Winter Olympics and placed 9th. In 1989, Koch was one of the favourites for the European Championships but she lost the qualifying competition in East Germany versus
Evelyn Großmann and
Simone Lang. In 1992 and 1993, following
German reunification, Koch attempted to qualify for international championships but was unsuccessful. == Personal life ==