FIT4green aims at contributing to ICT energy reducing efforts by creating a energy-aware layer of plug-ins for data centre automation frameworks. The plug-ins enhance existing IT solutions deployment strategies by moving computation and services around a federation of IT data centres sites, with the final goal to minimize the overall power consumption figure. Without giving up on compliance to Service Level Agreements (SLA) and Quality of Service (QoS) metrics, FIT4green optimization layer will be placed on top of the current data centres management tools to orchestrate the allocation of ICT resources and turning off unused equipments.The project will consider the deployment options of whole IT solutions, from the client devices to the data centres where the applications and services are dynamically allocated, including the impacts of the different networks providing the needed connectivity.The project rationale builds on shortcomings of current systems:-\tVirtualization, consolidation and data centre automation techniques provide a mean to achieve flexibility of IT solutions, but reduced energy consumption (achieved as side effect of server number reduction) is generally not considered among the Key Performance Indicators (KPIs) of any deployment options;-\tService Level Agreements don't include any metrics related to environmental footprint.FIT4green will explore both optimal deployment solutions satisfying existing SLAs with minimal energy consumption and next-generation energy-aware SLA statements - with minimal tradeoffs with respect to current metrics - providing high global improvements on environmental sustainability KPIs.FIT4green approach is potentially applicable to any data centre type; the project will run pilots using three representative data centres typologies: Service/Enterprise Portal, Grid and Clouds - provided by project partners with real test beds- to validate models, policies supporting the plug-in developed inside the project.