As a grunt on your first enlistment that's pretty much impossible. Cross training in this line of work means learning how to do a different job in the infantry. As a rifleman I would train to be a machine gunner or mortar man for instance.

Besides I already had a handful of billets with their own unique responsibilities and 10 different people I had to answer to. At one point in the deployment I had 4 jobs and was in charge of 8 guys and a dog. :crazyr: