Mr. Kostas Koumantaros, Msc, is a Project Manager and Software Engineer on GRID and Cloud Technologies at GRNET SA. He obtained the Bachelors Degree in Computer Science Software Engineering in July 1999 from the University of Essex. He subsequently pursued an MSc in Advanced Computer Science Software Engineering degree from the University of Manchester, which he obtained with excellent marks in October 2000. Since October 2002 he is part of GRNET Technical Department as the manager of GRNET's Open Source Promotion and Development Initiative and member of the Hellasgrid Task Force.