Anybody know what MOSs do not require a security clearance?

This is your job, you can help him, and good on ya for making the effort. I think it's relatively uncommon for a particular MOS to require a security clearance prior to attending a DMOSQ school. Security clearances are generally tied to positions, not job specialties. If you need other resources, send me a message.

That's not your job, and you can't help him. They will be reclassed based on what jobs have class seats. You can pull a list of all the jobs without clearances and it doesn't mean any one of the jobs he picks will be available. This Soldier needs to sit down with their Career Counselor as soon as they lose their clearance.

You may be thinking that you can help him by giving him some good ideas, but you can't, because you don't have access to the AIT open class seat list and anything you say will just be false hope and lead to disappointment. 90% of the time that Soldier is getting 88M or 92Y.

GT score may not be a factor. Secret clearances have become baseline for so many things this individual may have a hard time picking a job. They will most likely be force fed by the needs of the Army filling a role/billet for the near future while the Command sorts everything out. Most service members I knew who lost their clearance were stuck in a job where they were shuffling papers in the S-3 updating annual training records or driving a truck at the motor pool. The biggest thing they need to sort out is if this is a permanent situation that will effect their career or a temporary situation.