Navigate tax issues in PNG? The only way to deal with it is to pay tax and you will get absolutely nothing back, no other solutions. Having said this, AON in PNG do provide a super fund that you can self contribute to which doesn’t attract tax although there are tax penalties if you take it out under certain circumstances. The Australian ATO also has a taxation treaty with PNG, suggest you get advise from a financial expert opposed to us pilots before getting to excited.
Interms of the company in question, good organisation, good aircraft and good pay and conditions in comparison to anything that you would get offered in Australia in my opinion. Just be aware that PNG isn’t for everyone, it can be quite challenging for some people for all sorts of reasons.