Congratulations & give your son a job well done from me, not many kids now-a-days are willing to step up to the plate. My son joined the Marines 1.5 yrs ago (artillary) & I am very proud of what he has become, not that I wasn't proud of him before.
The Marines take good care of and watch out for the corpsman just as if they were one their own because they want them their when they get hit, I'm sure the army does the same.
The training your son receives will help and give him an edge up on the others if and when he returns to civi life and wants to pursue a career as a firefighter, he may choose to make the military his career. I've been a professional F/F for 29 yrs., not an officer but a 56 yr. old tailboarder and I'm loving it! Again wish your son the best of luck with his decision and his future career choice