How Do You Change Immigration Status Without Getting Deported?
You haven’t made it clear if his mother filed for his permanent residency application (Green Card) or he is on a visitor visa. If she has filed for his green card, he can apply for EAD (I-765 Employment Authorization Document) and on approval, he can start working here in the united states. He just has to keep renewing the document every year. It is an online process if he has all the documents and receipts. If he is on a visitor visa, I would recommend him to speak to an immigration attorney to get his green card application filed (sponsored by his mother). Make sure he stays in the legal status till he gets the receipt of his application. Also checkout the sites mentioned below.