Born in Piracicaba, in 1914, he moved due to the purchase of Fazenda São João by his father José, in 1935.

Sugar mill Usina São João was created there, which Hermínio took over after José's death.

Usina São João, the team became professional in the following decade and competed in FPF tournaments between 1961 and 1964.

Five years later, however, the patron Hermínio Ometto ends up dying before the successor, União São João, obtains great conquests.

It was also at Herminio Ometto that Rogério Ceni went down in history scoring his first free-kick goal of his career, on February 15, 1997, in the 1997 Campeonato Paulista, against goalkeeper Adinam.