The GridWay Metascheduler enables large-scale, reliable and efficient sharing of computing resources: clusters, supercomputers, stand-alone servers… It supports different LRMS types within a single organization or scattered across several administrative domains. GridWay provides a single point of access to all resources in an organization, from in-house systems to Grid infrastructures and Cloud providers. GridWay supports most of existing Grid middlewares, can be used on main production Grid infrastructures and can access to Cloud resources.