Molinari guest-conducted at all the important musical centres in Europe and the Americas, always as a symphony leader. Unlike most Italian conductors, he seldom conducted opera.
Composer Robert Starer tells about a musical experience he had as Palestine Orchestra's young harpist in the 40s:
"…I sat behind [my] harp, glanced at the most intricate harp part I had ever encountered, and looked with heavily beating heart at the conductor, Bernardino Molinari, a fine, experienced maestro. He must have sensed how I felt, for he gave me every single cue and somehow helped me to get through the first movement without any noticeable mishap…"