Jason with the ATR program was never an Eagle pilot. Straight hire into the ground instructor role. We have another ground school instructor that I have not ran across. I am told he is a aircraft mechanic by trade. We do have former Eagle pilots that are ground school instructors, but they are no longer on the list.
As I said, we do have check airman that serve as ground school instructors. But if you are only a ground school instructor, your are not on Eagle's seniority list. The ground school instructors have their own union; I remember talking with MS (emj instructor) and he sounded as if he was not employed directly by AMR.