Mondello played with Mal Hallett from 1927 to 1933, where he also simultaneously performed saxophone and trombone, and with Irving Aaronson's Commanders, Joe Haymes, and Buddy Rogers. In 1934–35 he was a member of the Benny Goodman Orchestra; he returned to play with Goodman in 1939–40. In the interim he worked with Haymes, Ray Noble, and Phil Harris.
