One of my sons needs job. He's applied to every job within reach and gets no replies at all. This includes a place where another son works and is short staffed

One of my sons needs job. He's applied to every job within reach and gets no replies at all. This includes a place where another son works and is short staffed. They say they can't get applicants. We see my son apply and get no response. From what we can tell, the current manager is required to post job listings and that's it.