José Roberto Marinho is a Brazilian businessman, the billionaire Vice President of the Board of Directors and Chairman of the Editorial and Institutional Committee of Grupo Globo, the largest media and entertainment conglomerate in Latin America. Born in Rio de Janeiro, in 1956, he is the youngest of three brothers who inherited the media empire founded by his father, Roberto Marinho (d. 2003).

Marinho received a B.A. in History from Pontifical Catholic University (PUC-Rio). His career began with hands-on work in the family business, initially working on the O Globo' newspaper in the early 1970s. His structural role is tied to the journalistic integrity and social responsibility of the massive media enterprise.

• Grupo Globo (Vice President of the Board): The core private asset, the largest media and entertainment conglomerate in Latin America (controlling TV Globo, O Globo newspaper, etc.).
• Family Governance: He, along with his brothers João Roberto Marinho (Chairman of the Board) and Roberto Irineu Marinho (Vice President of the Board), manage the empire.
• Philanthropy: He chairs the Roberto Marinho Foundation, which promotes education, culture, and environmental protection (especially Projekto Tamar sea turtle conservation).
• Cultural Significance: Grupo Globo was officially declared an Intangible Cultural Heritage of the City of Rio de Janeiro (recognizing its role in promoting Brazilian culture).

José Roberto Marinho's strategic leadership within Grupo Globo focused on the editorial and institutional direction of the media conglomerate. He served as Vice President of the Board (2003–2020) before transitioning to Chairman of the Editorial and Institutional Committee in 2021. His structural contribution is tied to the successful generational transition and maintenance of journalistic independence within the empire.

He chairs the Roberto Marinho Foundation, which is a major structural contributor to education, culture, and environmental protection in Brazil (notably supporting the Projeto Tamar sea turtle conservation program). His wealth is secured by the colossal, long-term, stable profitability of the dominant Latin American media and broadcasting sector.

José Roberto Marinho's social impact is massive and structural, tied to Grupo Globo's role as the dominant media voice in Brazil, influencing public opinion and disseminating information. His chairmanship of the Roberto Marinho Foundation provides a massive structural contribution to education and environmental conservation.

His structural contribution is tied to the successful generational transition and long-term private control of this essential national media asset. He is an avid equestrian and environmental conservationist.

José Roberto Marinho maintains the professional, composed style of a media executive. His attire is consistently formal and high-quality, favoring tailored suits. His aesthetic reflects stability and immense corporate authority, typical of a leader in Latin American media.

Residing in Rio de Janeiro, Brazil, his luxury is the immense security and financial reward derived from his multi-billion dollar fortune. His life is dedicated to media governance, environmental philanthropy, and strategic investment.