Unless there has been a complete change of management ethos, Hevilift would certainly not be a career-enhancing move from APNG. Anyone switching between these two companies would be literally jumping from the frying pan into the fire.
Speaking of people getting burned, the third contender for domestic operations in PNG, Travelair, seem to have gone very quiet of late. Are they still in business? Or does 'quiet' in these forums mean everyone there is deliriously happy and all their bills have been paid?