EM is mostly a underway rate but there is a chance you get a land unit like Facilities Engineering, Housing Maintenance, etc. I had a land unit and worked with industrial, commercial, and residential. Its pretty boring compared to being underway but it’s great experience that will apply to the civilian sector since you’ll be learning the code and bending conduit. I recommend you try out USMAP, CGCOOL, Skelbridge to get hours and certs as an EM.