While as an artist-illustrator living in The Bronx, New York, Huemer first began his career in animation at the Raoul Barré cartoon studio in 1916. He joined the Fleischer Studio in 1923 where he developed the Koko the Clown character. Later he moved to Hollywood and worked as an animator and director for the Charles Mintz studio. He subsequently moved to the Disney Studio, where he remained for the duration of his career, except for a 3-year hiatus from 1948-51 when he pioneered animated TV commercials and created