Sant’Ambrogio has played cello with the Saint Louis String Quartet, the Giavanni String Quartet, and Washington University's Eliot Trio. He was also principal cellist with the Casals Festival Orchestra in 1969 and 1970, and with the Grand Teton Music Festival, Jackson Hole, Wyoming, from 1980 to 1985.
Sant’Ambrogio has played cello with the Saint Louis String Quartet, the Giavanni String Quartet, and Washington University's Eliot Trio. He was also principal cellist at the Casals Festival Orchestra in 1969 and 1970, and with the Grand Teton Music Festival from 1980 to 1985.