Maybe start by looking into the VOT process, there's a couple of threads on the process on here, if you try the search function you should have some luck.
I'm not sure how widespread this is, but I know some units are only actively recruiting civi health care professionals; this might put a damper on your plans.
I suppose the next step might be to contact the unit recruiting cell, and see if they're hiring.
Out of curiosity, why the switch?
DF
edited for grammar