Shouldn't Service Members be able to see open assignments for their MOS on AKO and self-request consideration?
I encourage my Soldiers to take an active role in their assignments, and I ask them why they want to go to that location as well (many times they are trying to get close to where their families are or closer to where they grew up) - I am fine with that as long as they know the unit they are going to and they are prepared for that mission.
There is a tool available that our Soldiers can use, it is called the ACT and is available from the AKO home page.
I encourage you to familiarize yourself with the tool before showing your Soldiers (believe me, I had to get a class on how to use this resource), you find it from the AKO homepage, go to the far right drop down (believe it is called self service) then go to my training, then go to Army Career Tracker. There is a resource there that shows positions by MOS and grade that are open. Once the Soldier identifies the positions he/she can pursue the assignment as long as it matches with the mission set. Great topic.