Career
He is the third of four children of the deceased communications tycoon Roberto Marinho (1904-2003). João Roberto began his career as a journalist for the newspaper "O Globo". In the mid-1990s the Globo Organizations moved its command to the three sons of Roberto Marinho.
According to Forbes 2015 World Billionaire"s list, Marinho was placed at number 165 with an estimated Netto worth of $8.2 billion.
Grupo Globo
Marinho is vice-chairman of the Board of Directors, Chairman of the Editorial Board, Chairman of Grupo Globo Institutional Committee, and vice-chairman of the National Newspaper Association.