The composer Liette de Souza, sister of composer George Lucas and which would be Roberto's wife, was enchanted with his work and decided to submit it to Império Serrano, a traditional samba school in Rio de Janeiro, in the suburb of Madureira.

The mutual passion was installed and Roberto went to attend the social samba events of "green and white of Serrinha" (as the Império Serrana is known).

Once the directors of the samba school realized his talent and invited to be the handle of the Império Serrano at the carnival of 1971.

In 1977, the school leads the carnival with beautiful samba "Brasil, Berço dos Imigrantes" ("Brazil, Cradle of Immigrants"), coined in partnership with George Lucas, and in 1979, "Municipal Maravilhoso, 70 Anos de Glórias" ("Wonderful Hall, 70 Years of Glories"), with George Lucas and Edson Passos.

He successfully throughout the country with songs like "Tempo Ê" (Zé Luiz and Nelson Rufino), "Acreditar" (Dona Ivone Lara and Délcio Carvalho), "Estrela de Madureira" (Acyr Pimentel and Cardoso), "Liberdade" (Dona Ivone Lara and Délcio Carvalho), "Vazio" (Nelson Rufino), "Todo Menino É Um Rei" (Nelson Rufino and Zé Luiz), perhaps his greatest success, and "Meu Drama" (Silas de Oliveira and J. Ilarindo).