Please tell me how to to find out where someone is working I know the state and his social security number

Can you please elaborate as to why you need to find this persons current place of employment?

He has stopped paying his child support payments

Have you contacted your local child support unit? Or licensed private investigator is another. If he is working for cash, of course, there is nothing for you to collect unless you can prove that he is working off the books.

Credit for the above answer must go to JudyKayTee. For some reason I could not link to the post which had this suggestion.

Provided is a link which maybe of great benefit to you.

SupportKids (http://www.supportkids.com/):

There is no link or way for you to find out without having him followed, or having a PI research it.

Most states have child support enforcement groups, I would sue it.