 In the 1970s he became part-owner of the Spanish International Network (SIN), a Spanish-language network based in the United States with stations located in cities across the US with significant Spanish language populations.In 1986, the network was sold and renamed to Univision.Villanueva launched the annual "Navidad en el Barrio" telethon in 1971 to raise money for toys and food for needy Hispanic families in Southern California during the Christmas season, which was televised annually in December from 1971 to the early 1990s on KMEX-TV.