Hi Chris, there's not quite a dearth of human factors professionals - there are a few of us around - though probably not enough! you will find Professional Members listed at: https://www.hfesnz.org.nz/find-a-professional/ . Can I suggest you also email me directly at chairathfesnzdotorgdotnz with some more information, and we can get a communication out to our members to see if we can get someone to fit your needs to be in touch. I note that if you are searching the HASANZ website that we've become aware of a systems limitation - searching 'ergonomist' will find the HASANZ Registered Human Factors Professionals/Ergonomists, but searching 'human factors professional' finds all sorts of people from varying backgrounds, not just our qualified human factors professionals! Not ideal, and HASANZ is working to find a technical fix for this. The terms 'human factors professional' and 'ergonomist' are also interchangeable - any difference in perception is not of our making - mostly we will answer to either! (Personally, I go with 'ergonomist' as it is shorter). I look forward to hearing from you.
Kind regards' Marion Edwin, Ergonomist, Optimise Ltd, and current Chairperson of the Human Factors and Ergonomics Society of New Zealand

Many thanks, will do