I think that his chain of command would know more info about soldier to civilian life classes, or adjustment help. They may even help him find something in Texas hospital because he has knowledge, and experience in working in one.
He should look up numbers and information about the hospitals there, and see if they have openings and what not.
The VA is also a great source for help, you should definitely speak to a Representative and they can help you in so many ways. With jobs, housing, and etc. They have helped my husband and I very much, he just got out of the Army as well and they helped get him into college using his GI bill and also will hopefully soon be helping us get a house.
There are many people that he can talk to before he ETS's from the military. Have him ask his boss and see what they can do.
Best wishes to you and your family!