Leonardo Cyber Range is a multi-purpose operational environment, that aims to create realistic operational training scenarios using best-of-breed technologies for Infrastructure-as-Code provisioning, cloud management, software defined networking. Its goal is to adequately keep Government Agencies and Critical Infrastructures’ cyber security teams able to face complex cyber threats and attacks against information (IT) and operational (OT) technologies, to test new attacks and defence techniques, to verify infrastructures management procedures as well as actions and methods used to protect technological systems and to manage security incidents. The Cyber Range can be delivered on premises, provided in the cloud as “live lab” based training-as-a-service, or even accessed into dedicated tenants, in case of exercising and gaming over complex, wide theatres such as “digital twin” representations of enterprises and infrastructures