Ottó Hellmich competed in the colors of ÓTE both as a gymnast and athlete. As a member of the Hungarian gymnastic team, he won a silver medal at the 1912 Stockholm Olympics. After he retired from competitive sport, Hellmich became a trainer at ÓTE, also a member of its board, and later became a member of the MOTESZ board. Hellmich was a Civil Servant at the headquarters of the Budapest Central Bank, until his retirement in 1935. His brother, Miksa was an athlete, and competed in the 100 metres at the 1906 Olympics.