The internet assures me there are loads of these underemployed Unix/networking experts just sitting around waiting to set up your infrastructure. But in my experience, these people are actually really difficult to hire, and not at all cheap. (Possibly the sharp ones have 'sold out' and gone the SRE route and are now one of those '3000' people.)
So I wonder if there's a certain amount of wishful thinking on both sides here, like "I wish a 'clueful' company would hire me to be their head sysadmin...", while companies who have tried to do this on the cheap usually just have terrible ops. ("Whoops, the backups haven't worked in 2 years...")