Márcio Máximo Barcellos (born April 29, 1962) is a Brazilian football manager.
Born in Rio de Janeiro, Máximo was a member of Brazil's under-17 and under-20 sides coach staff from 1992 until 1993. The teams included the future stars like Ronaldo and Ronaldinho. He had been working as technical director to the Grand Cayman Islands for three-years when he rejected the offer of a ten-year extension and instead joined Scottish club Livingston Football Club on 5 June 2003. Máximo signed a one-year deal as head coach and became the first Brazilian to manage a British club. However, things did not work out and after nine games (3 wins, 3 draws and 3 defeats) he resigned on 14 October.
On 29 June 2006, Máximo was appointed head coach of the Tanzania national side Maximo helped Tanzania to qualify for CAN finals for home players. These finals shall take place in Ivory Coast from February 22 to March 8th, 2009. Tanzania qualified after beating Sudan 5-2 goal aggregate.
Máximo extended his contract with the Tanzania Football Federation (TFF) for another year until July 2010, but at that time he was replaced by Danish coach Jan Børge Poulsen.
In December 2011 he was named new manager of Brazilian club Democrata. He was sacked on 13 February 2012. In June 2012 he was rumored as the successor of Kosta Papić as manager of Young Africans S.C., but that job went to Belgian coach Tom Saintfiet. But in November 2012, chose to remain in Brazil, where he will lead the Francana.