Born in Cuorgnè, the Province of Turin, Sinato started his career at Turin club Juventus F.C.. Sinato played for Biellese in 1999–2000 Serie C2. In June 2000 Sinato and Luca Pellegrini were sold to Como in co-ownership deal for 150 million Italian lire and 100 million lire respectively, as part of Massimiliano Zazzetta deal for 150 million lire (Pellegrini returned to Juve in June 2001). In January 2001 Sinato left for Carrarese in temporary deal. The deal was renewed in summer 2001. In June 2002 the co-ownership deal between Juve and Como was renewed again, however in summer 2002 Sinato was sold to Como outright for about 100 million lire, which Juventus booked a financial cost of about €25,000 for the discount. Como immediately sold Sinato to Crotone in another co-ownership deal, as Sinato was a surplus for Como in 2002–03 Serie A. Juventus also paid Crotone to acquire Salvatore Aronica back to Turin in June 2002 and Crotone also acquired Pellegrini from Juve for 100 million lire. In January 2003 Sinato left for South Tyrol of 2002–03 Serie C2. At the start of 2003–04 Serie C1, Sinato left for fellow Serie C1 club Prato. In January 2004 Sinato left for Biellese again.