Paolo is a Scientist in the LBNL Physics and X-Ray Science Computing Group. He works as a developer of large HENP applications. Currently he is chief software architect of the ATLAS experiment at CERN. He coordinates the work of a core software team of physicists and engineers who have developed the libraries and tools ATLAS physicists use to develop and run their physics applications, from trigger selection, to event reconstruction, simulation, and analysis. The main components of core software are the Athena framework and the data model foundation classes. Paolo was invited to give a Plenary Session talk at CHEP09. Until 2003, Paolo was a collaborator of CDF where he worked on code generation, handling, and on the event data model. Before moving to Berkeley in 1998, he was a Post-Doc at CERN and at the Scuola Normale Superiore in Pisa where he also graduated in Physics.