During his first enlistment, he served with the 10th Cavalry Regiment, 2nd Brigade, 4th Infantry Division(4ID) at Fort Hood, Texas. 第一次应招入伍时他服役于德克萨斯胡德堡第四步兵师(4ID)第二旅第10装甲团。
Colonel Dornstauder's assignments include : Platoon Leader and Executive Officer, F Company, 4th Engineer Battalion and Commander, B Company, 12th Engineer Battalion, 8th Infantry Division; 亚历克斯上校历任:第8步兵师第4工兵营F连排长兼主任参谋和第12工兵营B连指挥官;