There are multiple reasons, but the big one is there is almost no overlap between the engineering team's reason for existing (writing and maintaining line-of-business applications) and ours (keep systems up, compliant, performant and safe).

But if it makes you happier, one tool we use is Puppet. That runs in JRuby in a JVM to execute their own weird DSL. So to use it in a nontrivial environment, you need to be able to tune Java and write both Ruby and Puppetese.