Marcelo de Oliveira Santos (born 4 March 1955) is a Brazilian professional football manager and former player.

Born in Pedro Leopoldo, Minas Gerais, he was known as Marcelo during his playing days, and was an Atlético Mineiro youth graduate.

He was included in Osvaldo Brandão's list ahead of the 1975 Copa América, and made his debut for the full side on 30 July by starting in a 4–0 home routing of Venezuela.

[1] After a period as a sports commentator on Rede Minas, Oliveira began his coaching career at first club Atletico's youth setup.

After the arrival of Alexandre Gallo he returned to his previous duties, but as the latter was dismissed in July, he was appointed manager; he avoided relegation with the club, but was still released in December.