Forget about snowboarding it has zilch to do with that shit.
On the other hand there is a ton you can do now to start becoming a mountaineer, an alpinist. This, along with as much medical training as you can muster (getting up to EMT would be solid) are the things you need to work in elite specialized groups doing rad shit like this.
Pilot license is another thing to consider.
Multi-pitch ice climbs. (may not seem directly relevant but signifies an ability with basically all the essential winter alpine gear)
Small engine repair.
Cross training, peak physical conditioning.
True jack of all trades, ability to fix anything with mustache hairs and unicorn semen.
Get crackin' ya squid.
edit. as someone else said if you can choose your path in the military (get good grades and perform well) you could probably cover a significan chunk of these bases in a short amount of time and get paid to do it. Probably less dangerous than the work you are going for anyway.
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Last edited by snowklinger; 11-30-2013 at 03:38 AM.