Giacinto Donvito [M] is the system administrator of the CMS and Alice Tier-2 computing centre at INFN-Bari since 2004. He has participated in all the EGEE and EGI projects and worked for several bioinformatics projects (BioinfoGRID, LIBI, BioVeL) gaining experience in supporting users from different scientific communities. He worked for IGI (Italian Grid Initiative) where he was involved in testing Cloud Computing solutions and grid services. He is now working for the ReCaS project to test innovative solution for storage management and batch systems. In the PRISMA project, aiming at the implementation of a full IaaS+PaaS cloud solution for Public Administration and scientific communities, he leads the WP taking care of implementing the IaaS layer. He has collaborated since the beginning with the EGI Cloud Task Force to support the OpenStack-based INFN-Bari deployment. It is now acting as Technical Director and as WP leader of the Work Package developing PaaS layer in INDIGO-DataCloud project.