 Marconato joined Benetton Treviso's youth team in 1990, and with them he won three Italian juniors club titles between 1991 and 1994.In 1993, he made his debut in Italy's top-tier level men's professional LBA, with the senior team of Benetton Treviso, in the 1992–93 season.However, he did not have a regular place on Treviso's roster, so he was loaned to Padova, where he demonstrated his talent.