Exams are given at Imaging USA and may be offered at regional state convention.
Beyond that you can usually schedule an exam with a CPP Liaison.

NJ currently does not have any liaisons but there might be ones in neighboring states that would not be too far of a drive.

The list of Liaisons can be found here: http://certifiedphotographer.com/

You have to give them 6 wks lead time in order for them to get the exam in. It may feel weird going to another State but I can tell you for me ... it's absolutely not a imposition to proctor the exam and I'm happy to host them.