There's really zero excuse for continued use of CentOS,
especially for
Government systems.
Honestly we would probably use RHEL for our servers if we could afford it, simply because
it would be one less thing to worry about, but for a small company that nevertheless has
lots of servers, the cost, or at least what we were quoted, was prohibitive. Actually even
using CentOS required a cultural adjustment. Before that we built the OS ourselves from
source code.