Formed in the youth categories of Fluminense FC, Mário was a central midfielder.
[4] After competing in the 1986 Copa Libertadores, he was sold to Sporting CP, where he was champion of the Supertaça Cândido de Oliveira.
[6] As a coach, Mário Marques stood out when managing teams in Rio de Janeiro in particular.
[6] He managed the America team during the beginning of the 2002 Torneio Rio-São Paulo.,[7] in addition to Portuguesa-RJ, Angra dos Reis, Nova Iguaçu, Cardoso Moreira, Boavista and the under-20 team of Fluminense FC.
[13][14] His son, Mário Marques Coelho Júnior, better known as Juninho, was also a professional footballer, playing for teams in Portugal minor divisions such as A.D. Sanjoanense and G.S.