NVG is not a dark art
true TC but it is one that needs respect as complacency on NVG, especially in tricky terrain and poor weather, can be a killer.
The on the job training will be sufficient as long as there is a proper ground training package behind it so that the physiological problems and technological shortcomings of NVG are properly understood by those who are new to them.
Additionally there needs to be adequate continuation training to ensure that crews are setting them up and focusing them properly using something like a Hoffman box. NVG are often seen as a 'strap on and go' item that turn night into day - that works on a nice night in easy conditions but you need training to get the best out of the goggles.
Junglie Jock - as TC has said, the managed transition is the way to get directly from milSAR to SARH - what concessions will be made in terms of hours and IR we have yet to see - otherwise you have to apply in direct competition with the rest of the world which will mean sorting your own IR and possibly type conversion.