Manuel Guijarro has been working at CERN since 1990 in the Information Technology Division. He is a System Analyst specialised on Distributed and High Availability Systems with wide experience on both commercial and Open Source based platforms. He has been main architect for a lot of Computing Infrastructure for Mechanical Engineering (PARC, CAD/CAM, EDMS, etc) and Software Development (CVS, SVN, TWiki, etc). Currently, he is responsible for Oracle Enterprise Manager service and IT/DES Monitoring Services Working group. He holds a degree on Computing Science and a Magister (Master)on Computer Architecture by the Universitat Autnoma de Barcelona.