Check out the 79R and the 79S pages on RallyPoint:
If you click on the "Primary" tab -- you'll see all those who have 79R/79S as their Primary MOS and are currently in that field. If you click on the "Secondary" tab, you'll see all those who have it as a Secondary MOS, and have gone back to more line unit type of role (which sounds like it's what you may want). You can learn best about career opportunities by looking through what other people have done... and you can try to connect with those that you find most interesting and ask to learn how they went about getting there.
I hope that's helpful. Let us know how it goes.
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