Marangoni started his playing career in 1974 with Chacarita Juniors he then joined San Lorenzo de Almagro in 1976.
In 1979 he joined Sunderland A.F.C. of England where he failed to settle, his contract was terminated in 1980 and he returned to Argentina.
Marangoni played one season for Huracán before joining Club Atlético Independiente in 1982. He won three major titles with the club, the 1983 Metropolitano followed by the Copa Libertadores and Copa Intercontinental in 1984.
In 1988 he left Independiente to join Boca Juniors where he wom a further two international tournaments, the Supercopa Sudamericana 1989 and the Recopa Sudamericana 1990.
Upon retirement, Marangoni start Escuala Modelo de Futbol y Deportes, the first-ever professional soccer schools and sports clinics for Argentina’s youth.
The schools serve children from age 3-13 and are franchised throughout the country, serving public and private schools, community centers, country clubs and businesses. Integral to the company’s model is free tuition for underprivileged children. Since selection, he expanded his training schools to Chile and Spain.
His work was recognized by Endeavor (non-profit) and he was selected as an Endeavor Entrepreneur in 1999. Endeavor is a global non-profit that selects and supports High-Impact Entrepreneurship in emerging markets.