Hi Curtis,
My apologies for letting this inquiry go unanswered.
If you're running in proxy mode, all job processes are run under
the qubeproxy user's ownership, and they will be limited to its
privileges. On Unix (OSX, Linux), I suppose that you could set
the "sudoers" on the worker machines so that the qubeproxy user
is permitted to run certain commands (such as rpm) as root.
This, of course, would allow anybody using Qube at your site to run those
commands, so please be careful.
Please consult your system's manual pages on "sudo" "visudo" and "sudoers".