[1][2] His father, César Sr., headed the San Pedro newspaper El independiente, having succeeded Mascetti's grandfather, Alejandro, who established the paper in 1892.
[1][2] During his tenure with the network, Mascetti interviewed politicians such as Salvador Allende, Juan Perón, Arturo Umberto Illia, Raúl Alfonsín, Carlos Menem,[1][3] as well as cultural figures including Jorge Luis Borges, Atahualpa Yupanqui, and Marcel Marceau.
[2] He was the first journalist from Argentina to interview a member of the Beatles,[3] when he talked to a naked George Harrison in 1977 on a beach in Rio de Janeiro with Emerson Fittipaldi acting as translator.
[2] Mascetti also reported on the 1972 Uruguayan flight disaster in the Andes, Peron's return to Argentina the following year, the Nicaraguan Revolution and overthrow of Anastasio Somoza Debayle,[3] and the death of Francisco Franco in 1975.
After retiring from journalism in 2015, he went back to San Pedro and established a rural tourism centre called La Campiña de Mónica y Cesar.