 Sidny was signed by Náutico in mid-2006, one of the major club in that state in temporary deal, where the team became his stepping stone.He finished as the third in 2006 Campeonato Brasileiro Série B and promoted to the top division of Brazil.In January 2007 the temporary deal between Náutico and Salgueiro was renewed as well as Sidny's contract with Salgueiro.