Here is a broad look at his work with the Disney Studios:
Muppet characters: Miss Piggy, Sam the Eagle, Fozzie Bear, Animal, other smaller roles. He performed these characters for many years, including television shows and movies, long before they were part of the Disney company. These are featured in Disney productions The Muppet Christmas Carol and Muppet Treasure Island. He also performed these characters on Disney Channel's Muppets Tonight.
He has performed Yoda or voiced Yoda in the following projects: The Empire Strikes Back, Return of the Jedi, Star Wars: Episode I – The Phantom Menace, Star Wars: Episode II – Attack of the Clones, Star Wars: Episode III – Revenge of the Sith, Star Wars: The Force Awakens, Star Wars Rebels
As a voice actor outside of the Muppets and Yoda, he was heard as Fungus in the Pixar film Monsters, Inc., as Subconcious Guard Dave (alongside fellow Muppet performer Dave Goelz as Subconcious Guard Frank) in the Pixar film Inside Out.
In the theme parks he voices Yoda in the Star Tours attraction and he performs miss Piggy, Fozzie and Animal in the attraction Muppet Vision 3D.
He performed Miss Piggy, Fozzie Bear, Animal in the television special The Muppets at Walt Disney World.
He was the director for the Touchstone Pictures film What About Bob?