Use the search feature.  You'll find all the answers you need in detail. In short, YES they call your job. About the only thing they say is " May I speak to Mr. so and so (YOU), then ask you your security question that you filled out on application to verify it's you, then they'll say congradulations you win-you passed-blah blah and say you'll get an email with your confirmation or ID number!  These people are very professional and discreet, they are very easy to work with if you have questions or concerns, email and ask them for details or about special ways you need to be contacted.