vSphere is all you need.

vSphere allows us to manage multiple clusters across the US and Canada on a single view. Its built-in security layer allows us to assign access based on user credentials. New users will find vSphere relatively easy to learn and use without any training needed. With vSphere having multiple frames you will be able to see what is happening in realtime while you are working, also they have a great search feature that will get a lot of use with the bigger clusters.