If you don't get a response and you're tired of waiting, tell the NPC your contact information. The more the better. do an @puppet-request, saying what you're wanting (a job) and the information you gave them.
If you do a phone number, you might get called. SIC you might get SIC'd. Gridmail is cool because you might get contacted while you're offline. And this information is really important because the information might just get passed to players to handle the hiring process, and they need good ways to get in touch.