From this time, he played with legendary musicians as Freddie Hubbard, Clifford Jordan, Jimmy Cobb, Bob Berg, Dave Liebman, Don Cherry.

In 1987 another jazz band is decisive in his musical career : the original trio with Manu Roche on drums and Furio Di Castri on bass which is converted in quartet with the venue of Joe Lovano (Imagine CD).

In 1994, Boltro and his friend Stefano di Battista (saxophonist) entered the French Orchestre National de Jazz conducted by Laurent Cugny.

In 1997, Boltro participated at the quintet Di Battista/Boltro with Eric Legnini on piano, Benjamin Henocq on drums and Rosario Bonaccorso on bass.

In 2012, Boltro released Joyful with a new quintet : Rosario Giuliani (sax), Pietro Lussu (piano), André Ceccarelli (drums) and Darryl Hall (bass).