25->20 years ago I had a dream job, my first post-high-school job. I had my finger in just about every pie the company had available at various stages, from prototype & low-volume manufacturing inc making our own bare PCBs, electronics service & repair, to designing electronics, writing firmware, working within a stock controlled system, writing documentation, doing "systems engineering" getting some of those projects integrated within large industrial machinery, and all the while working alongside a few qualified engineers who themselves were working on a wide range of projects.
i soaked up knowledge & experience at a rate unlike almost any other time in my life since, and most of that time while I was doing EE @ UTS either part-time or 'sandwich' (back in the days when UTS's undergrads had to do 6 months uni, 6 months work, for 6 years, to qualify).
i was only making about $20k-$25k/year (in early-90s $AUD), it sucked and I knew it, but I knew I had an incredibly valuable learning experience to wake up to every morning. (the financial trouble came when I left home & tried to live off that.) looking back now, I wouldn't have changed a thing.
if I were around that age now, I'd give my left nut for a job like that - it gave me such a thorough grounding in the electronics business unlike so many of my peers at the time who were "clueless". I was a raw beginner in so many of those things when I started, but I had awesome colleagues who were willing to teach me, I learned quickly, and by the time I moved on I was "very competent" in so many areas that few other jobs would have taught me all in 1 job.
although Dave's job description sounds like he's looking for a Mini-Me, lets face it, what job doesn't ask for way more than they expect to actually get? and what sounds like about au$22/hour would make it difficult for someone not still living with parents, there are 'smart cookies' out there who would fit this mold & already have a basic understanding of many of the skills he's seeking. I saw several of them at Sydney's mini-Maker Faire.
an 18-25yo me in today's world would JUMP at a chance like this.