Odd, are you asking for yourself or for another?
You say: "What would you recommend to a new grad planning an OH career? How do we claw back our professional credibility? Or do we bother?"
In America for a new grad I'd recommend at least six months in Med/Surg, then transfer to ED or ICU (via a fast-track course of study) and spend a year there.
Then I'd recommend, or while still working at the above if possible, accruing the 1000 hours of Occ-Med work necessary to sit for the COHN-S exam. Then I'd work for a year or two in an environment where you can get some quality exposure to Occ-Med stuff.
Then, because let's face it RN's are NOT in shortage at all, and I think that will get worse since schools
have doubled or quadrupled their RN output over the past 4 years, (My alma mater has) I suggest quitting and becoming an Advanced Nurse Practitioner in Occ-Med via a NIOSH Research college.
Now you have the necessary background to make $70 to 90,000 US$/year. Four years ago I'd see a dozen ads for Occ-Med RN's, today I see a dozen ads for Advanced Nurse Practitioners and maybe one for a RN part-time.
You of course have an MSN, but the ANP especially from an Occ-Med program is highly saleable. As for global, since you're from Oz, I certainly hope that Occ-Med improves. After all, though not in Oz, but in Asia, all the jobs that caused all the RSI's, Ergo, and toxic exposures have simply been shipped from the US (and maybe from Oz too) to China, Malaysia and so on.
It saddens me to read that there seems to be little interest internationally because the price tag in 20 years will be monumental.