The question is more like is it possible to get a job at a Maccas in Chicago after being fired from one in NYC.

But I think a good question to ask is - is it possible to get short order cook work anywhere in the US after being fired from McDonalds. Might depend on the reason but, most likely ... yes.

i don't think this a good way of reframing OP's question. From the few YC founders I've interacted with, the network they maintain is a lot closer than you may think. They don't all necessarily view each other as competition as one may think.