Guido Quaroni (born November 9, 1967) is an Italian voice actor and Supervising Technical Director at Pixar Animation Studios. He was one of the developers of solidThinking, a NURBS based 3D modeling and rendering software.He attended the faculty of Electronic Engineering at the Politecnico di Milano in Milan Italy from 1987 to 1992. In 1991 Quaroni started his professional career as a software engineer designing and writing the first version of solidThinking, a NURBS based 3D modeling and rendering software for the NeXT platform. solidThinking was awarded as the best new application in the "CAD and 3D" category at NeXTWORLD EXPO held in San Francisco in June 1993.In 1996 Quaroni interviewed during SIGGRAPH in New Orleans for a position at Pixar and in January 1997 he moved to the U.S. to start working on Toy Story 2.Quaroni worked initially as a generalist Technical Director on Toy Story 2 performing modeling, articulation, shading and special effect tasks. In 2000 he was promoted sequence supervisor for the movie Monsters, Inc. focusing on dynamic simulations and special effects. Upon completion of the movie in 2001, Quaroni moved to the Software R&D division leading the team responsible for the shading and texturing production pipeline.In 2007 Quaroni returned to production taking the role of Supervising Technical Director for the movie Toy Story 3 leading the teams responsible for characters, sets, animation controls, surface materials, lighting, special effects and rendering.As a Voice Actor, Quaroni provided voices for three of Pixar's feature films, Monsters, Inc., Cars, and Cars 2. He has also performed additional voices on Tokyo Mater.