Marcio Augusto Aguiar dos Santos, better known as Márcio or Testão (born 20 December 1981) is a Brazilian footballer who plays as a goalkeeper.
Marcio began his career at São Paulo in 1999.
Despite being relegated to Serie B, continued at the club until the following summer, when it was released.
And since 2008 the Guild is Prudente (by March 2010, the club was called Barueri).
He moved from Grêmio Prudente to Brazilian Série A side Atlético Paranaense on 14 May 2011.