How can an internal candidate stand out?
What should I bring to an internal interview?
Bring your resume, work samples, and an internal reference list—it's a great way to demonstrate your credibility within the organization. You should also be ready to talk about your prior experience outside of the company. Sure, they know you, but they may not know (or remember) much about what you've done before.
How do I prepare for an internal promotion interview?
Related Question How do you stand out in an internal interview?
Should I tell boss Im interviewing?
It's better not to jeopardize your current position until you've accepted an offer for a new job. Nevertheless, when it is time to tell your current boss, remember to be polite and at your professional best. It is best not to burn any bridges.