Hey Peter, thanks for doing the AMA. Kind of a high-level question... but what is the typical process of hiring someone to work in the US who isn't a US citize

Hey Peter, thanks for doing the AMA. Kind of a high-level question... but what is the typical process of hiring someone to work in the US who isn't a US citizen? i.e. what steps does the potential employee need to take vs the company, & in what order? Thanks!