Disclosed are methods and systems for creating a secure and dynamic public cloud-based cyber range by first creating a plurality of subscription-based virtual private networks on each of a plurality of public computing platforms. The public computing platforms may be accessible via a network, and may include at least one server. At least one virtual cyber range may be created relative to each of said private networks. Each cyber range may include a virtual network of one or more virtual computing components. The network traffic of said cyber ranges may be managed via at least one master controller to isolate said cyber range from a remainder of said public computing platforms not accessible via said network.