Giovanni Piccolomo was on the squad of Corinthians in the 2012 Copa São Paulo de Futebol Júnior.
He was also part of the squad who won the 2012 FIFA Club World Cup and 2013 Campeonato Paulista.
[6] With his Corinthians contract over, Giovanni Piccolomo signed for a second time with São Bento in July 2016, agreeing a contract until the end of the 2016 Campeonato Brasileiro Série D.[7] He played in six of the second phase games, scoring twice, helping São Bento gain promotion and agreeing to stay at the club in 2017.
According to his manager this was due to personal problems, but Giovanni himself blamed lack of payment of wages.
[12] His 33 appearances and 5 goals helped the club win promotion from 2018 Campeonato Brasileiro Série B, but a new contract could not be agreed and he signed for Coritiba in January 2019.