@purpletitian: didn’t I say it is “not easy”? Did you want me to say it is “impossible” because sorry I said “it was not impossible either”. What If I tell you I actually know two international students who graduated from caltech recently got hired by a U.S. Company. They are sponsoring their H1B and promised to sponsor their green card as well. Whether they could successfully get GC for them is yet to see but this is when you say “it’s not impossible either”. Hope it makes sense to you.