His film credits include "The Dirty Dozen," "Pillow Talk," "Good Neighbor Sam," "Guess Who's Coming to Dinner," "Hush...Hush Sweet Charlotte," and "Krakatoa: East of Java," among others. On screen, he led the orchestra for three episodes of "The Colgate Comedy Hour" and most notably played bandleader Happy Kyne on "Fernwood/America 2Night," for which he also composed the score.
He wrote and conducted incidental music for "My Three Sons" and "The Brady Bunch".
DeVol's first film score was "World For Ransom", directed by Robert Aldrich.
DeVol was replaced as "Camp Runamuck"'s Doc Joslyn by actor Leonard Stone.