Authority to Operate (ATO) available government systems

All,

Looking if there is an ATO for RHEV before I go down this path of installing a new backend in my office. I need to see that when this goes through the Risk Management Framework (RMF) process, it is approved. If this is true, what are the steps required to secure it? I see the RHEL7 stigs, but they don't pertain to RHEV for the most part (or do they?)

Thanks in advance

Dave