Thiago Leitão Polieri (born 12 June 1978) is a Brazilian football manager and former player who played as a midfielder.

After making his first team debut, he represented Internacional de Santa Maria and Ceará before moving to Bolivia in 2002, to join Jorge Wilstermann.

In 2008, he agreed to a contract with The Strongest, and had a subsequent short stint at local side União Barbarense before returning to the club in 2009.

[2] In 2013, after spending some time without a club, Leitão joined Sport Boys Warnes in the Copa Simón Bolívar.

On 1 October of that year, he was sacked after a poor performance in the Clausura,[11] and took over fellow league team Royal Pari fifteen days later,[12] where he also left by mutual consent on 26 November.