I had a part-time job when I was 17, delivering chinese food and doing kitchen prep between deliveries. I worked three nights a week. I let it be known that I would be happy to work six days. As soon as one of the other boys left, I was offered the additional days.
I think your son needs to recognize that employers are not stupid. Have him take two part-time jobs and let both employers know that he would be happy to work full time. Do not play one employer off on the other. Just reward the employer who first offers full time employment.
To deserve this opportunity, your son needs to work HARDER and SMARTER than his competition for that work. How can this plan possibly fail?
Well, it can fail if Obamacare penalizes employers who employ people for more than 29 hours per week. Let your son know that voting for Democrats plays a large part in why he might not get a full time job. That is a lesson he needs to learn well.
Just for context on your work history, how old are you now?