I would think it's a tricky role to perform from outside a country.
You could live in Aussie and just pop over regularly. Didn't the Black Caps have an Australian coach at one stage who did that? Can't remember his name, or find it. Anyway, NZ Cricket probably paid him more in travel allowances that they paid the whole team back then. I recall that same coach never did get on with Shane Warne when he was coaching the Australian nation team. When asked his opinion of that particular coach, Warne said that professional cricketers didn't actually need coaches, except to transport them to the airport.
But, back on subject: yes, I'll concede, Rob Sherman is probably living in NZ. :)
Steve Rixon?
I don't think he ever coached the Black Caps and he isn't an Aussie.
Can't be worse than Darije Kalezic then. Should we give him a call?