He was hired in 1954 as the superintendent of the Staff and Plaster shop for Disney Land Park. He and his crew were responsible for the molding, casting, and finishing of a vast array of unique Disney Park elements including Autopia cars, Jungle Cruise elephants, Primeval World dinosaurs, fiberglass stone archways, plaster rock battlements, and golden castle turrets. To create the mountain for the Matterhorn Bobsleds, Bud and his team laid four acres of plaster. In Orlando, he used an old fertilizer storage shed as the initial workshop for molding and creating the components for Cinderella castle in Walt Disney World Resort.
In addition to the theme parks he helped make exhibits for Disney's projects in the 1964 World's Fair. He was a member of the Disney Golden Years Club.
Washo has a window in his honor on Main Street (which he shares with son Bill) in the Magic Kingdom and at Disneyland (as seen above).