Competing in three Winter Olympics, he won the silver medal in the men's doubles event at Innsbruck in 1976.

Schwarm also won two medals at the men's doubles event at the FIL World Luge Championships with a gold in 1979 and a bronze in 1977.

He also won four medals in the men's doubles event at the FIL European Luge Championships with one gold (1977), one silver (1972), and two bronzes (1973, 1980).

[1] Schwarm's best overall finish in the men's doubles Luge World Cup was second in the inaugural 1977-8 season.

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