Amid this time, he also produced sessions for a diverse range of artists including Adriano Celentano, Diego Torres, Divididos, and Myriam Hernández, and co-wrote with the entirety of Desmond Child's publishing company, Deston Songs.

Shortly thereafter, Sage opened Speakeasy Studios in the Hollywood Hills, where both American and international artists such as Ricky Martin, Janelle Monae, Kevin Bacon, Elisa, Negrita, Doyle Bramhall II, Amaia Montero, Tiromancino, The Lonely Island, Club Dogo and Vasco Rossi, among many others, have written and recorded.

Operating since 1991, Sage Studio INC has also functioned as an executive production firm connecting many European and South American musicians – namely, Eros Ramazzotti, Diego Torres, Myriam Hernández, Adriano Celentano, Divididos, Tiziano Ferro, and Jovanotti.

In 2009, he co-wrote the title track for Sony's The Lodger[7] (starring Alfred Molina) with composer John Frizzel, featuring vocals by classical singer, Sasha Lazard.

Sage has produced prominent duets featuring Cristina Scabbia of Lacuna Coil alongside Italian music icon Franco Battiato, and also Leona Lewis with Biagio Antonacci.

Along with engineer Michael Tacci, Sage produced The Tigers, an LA indie band appearing on Thrive Records' compilation His Hers by Amanda Scheer,[12] which spotlighted such talents as Oasis, Daft Punk, and Ryan Adams.

Sage in his career also focused on the discovery, development and production of many indie artists including Amana Melomé, Jameson Burt, Chris Wood, Neila Dar and many others.

Sage has also acted as the musical director of Hit Week, a two-week live event in New York City and Los Angeles that showcased notable Italian musicians in the United States.

[13] In recent years, five of Sage's and Rossi's songs, "I soliti," "Sto pensado a te," "Manifesto futurista della nuova umanitá", "Cambia-menti" and "Come Nelle Favole " went No.

Several recordings are currently active under Savana, including neo-soul / reggae singer, Amana Melome,[14] guitarist Fabio Mittino (with the recordings of music of G.I.Gurdjieff-T. DeHartmann) and an eclectic project called SOUP together with drummer Vinnie Colaiuta and guitarist Marcello Cosenza and guests John Beasley, Chad Fischer, Simone Sello and Alex Alessandroni, Jr.[15] In 2012, Sage reunited his original band, Astaroth, and produced a full-length album entitled The End of Silence.

Sage also collaborated at Speakeasy Studios with The Lonely Island, a project by Saturday Night Live comics Andy Samberg, Akiva Schaffer, and Jorma Taccone co-writing/producing Dramatic Intro which is the opening song of their CD The Wack Album.