Apologies for being somewhat off-topic, but does anybody know if there are citizenship requirements for working at a place like SpaceX?
I have a solid background in materials science and metallurgy from a world-class university, and find what Musk is doing very inspirational. After I finish my PhD, I'd love to be a part of it, but I'm British and I know with some companies in the industry there're citizenship requirements for security reasons. As he mentions in the interview, they wouldn't want China stealing their ideas, for example. And I know a lot of the job postings on SpaceX list "US citizen or permanent resident" as a requirement, but I didn't know if this was a hard and fast rule, or whether exceptions are possible.