Hi Peter, thanks for doing this AMA! I’m a cofounder of a startup in the US. Two of us are here on green cards, but our third cofounder is based in Switzerland

Hi Peter, thanks for doing this AMA! I’m a cofounder of a startup in the US. Two of us are here on green cards, but our third cofounder is based in Switzerland. He has a PhD from a top university, previously founded a company, and has raised over $30M in the past. At what stage would it be possible for us to bring him to the US on a visa? Would it be: - As soon as we incorporate a C Corp? - After raising funding? - Once we have revenue? Are there any specific visa pathways (O-1, L-1, E-2, etc.) that would be most relevant for him, given his background? Appreciate any guidance on this!