In reply to Thelongcon:
I would join the NZ Alpine Club (Australia Section) then look into doing their subsidised courses in order: Snow 1, Snow 2, then High Alpine Skills. You may find that only the first 2 are running in your time period. Supplement this with the 2 or 3 day Mountain Safety Council Avalanche course for climbers/walkers for a good grounding.
The NZAC courses are very good value, but if you can't get on them, or they're at the wrong times for you, then the various guiding companies here do similar, but more expensive courses.
If you get at least Snow 1 and 2, you could look to do some of the easier NZAC trips, but be honest about your ability and experience.
If you can squeeze some time off in Aug, consider the Remarkeables Mixed and Ice Festival: there are good skills clinics there.
NZ mountaineering is difficult, has long walk ins and very variable conditions, but learning here gives a good grounding for anywhere else.