Summing, yes. You will have to go through basic training. Essentially the military part of the Corps is made up of soldiers who are also trained as engineers. You'll most likely go to basic training at Fort Leonard Wood and AIT (engineer job training) will be there as well. I'm not sure how to join them as a civilian but as a soldier, I love the Corps and can't see myself leaving anytime soon. I encourage you to look into it more.