The next role.

So while I am happy where I am currently, I have made it my goal to move upward in my career in the next two years. 
While looking at open opportunities I wondered how many would be open for a candidate that was not internal. 
What factors or experiences put a outside candidate in a good position to lead a customer success team? 
I know, I know, success, track record all matter . I am more curious about the tactical pieces. 
Love to hear people’s thoughts.