He competed in the long jump at the 1928 Summer Olympics and finished 18th.

Dobermann first trained in gymnastics and then changed to athletics, winning the German long jump title in 1925–1927; he finished third in the shot put in 1930.

In 1930 he immigrated to São Paulo, Brazil, where he first worked as a coach with the German School (Escola Allemã), with which he won the state college athletics championships (campeonato collegial de athletismo) of 1931.

He was also one of the three coaches for the athletes of the state of São Paulo which participated in the Latin-American Championships (or Games) of the same year.

This biographical article about a German long jumper is a stub.