I'm not the person offering this job, so I have only limited information -- but I can connect you with the person doing the search.
They're looking for a mid-level Unix person to support a 24x7 production environment. Things you'll need: Unix sysadmin background (obviously) with things like Solaris, AIX, Linux; monitoring; application installation and support; security; backups. There's some off-hours and on-call work involved as needed.
