How can I locate a person's current employer (so that I can leave a message to call me)? I have the SSN, DOB and full name! Any clues that don't cost a lot?

How can I locate a person's current employer (so that I can leave a message to call me)? I have the SSN, DOB and full name! Any clues that don't cost a lot?
With that info you should be able to contact the person directly, why contact the employer ?