His activity has been documented since 1692, when he took part as a violone player in the music for the patronal feast of S. Lorenzo in Damaso sponsored by Cardinal Ottoboni.
In the Lent of 1695 he made his debut as a composer with the Latin oratorio Iahelis de Sisara triumphans (libretto by Antonio Checchi), performed in the oratory of the Crocifisso di S. Marcello.
In 1696 he was a member of Francesco Maria Ruspoli's household, as we read in the printed libretto of Latin oratorio Moysis nativitas (text by Antonio Checchi).
He composed the music of the cantata L'Apollo (text Massimo Scarabelli), commissioned by the Accademia di S. Luca for the annual festival of painting, sculpture and architecture, celebrated in Campidoglio on May 6, 1706.
According to the contemporary Giuseppe Ottavio Pitoni, Colombani left Rome to accept a position as a chapel master in Ronciglione; he then went to various Italian cities, including Naples, and returned to his homeland where he entered the service of the Marquis d'Este.