Guido Quaroni began his career at Pixar Animation Studios in January 1997. He worked for two years in modeling, rigging and shading for "Toy Story 2," and then went on to work in effects for the film. Quaroni later became the sequence supervisor in the shots department for "Monsters, Inc." where he worked on hair and effects technology. From there, he continued to work with the Software Research and Development team, of which he was the leader for the asset/shading pipeline and later on lead of the Production Engineering team.