Not sure of Iranian experience. That wait is there in Canada too for security roles. I recently got top security clearance for a new job even though I hadn't spent 10 years in Canada. It took me 4 months, but company told for Iranian national who have not spent 10 years in Canada, sometimes it takes upto a year or even rejected. That's why they were very reluctant to go ahead with me initially, but in their terms they couldn't find any person in Canada with this experience.USA has banned entire countries from immigrating to them. You should talk to Iranian folks and their experiences, it isn't nice. They are not a model country to look at when it comes to immigration when it comes to the humanity. US does very well with bringing in talent, so does Singapore too, neither are a "great model" or loved by immigrants for it. They are not welcoming tbh.
Iranians in US: I did my master's in US -Electromagnetics and Antenna design. That course was full of Iranian and Chinese students and even my master's thesis advisor was a professor from Iran. For Iranians, the issue is they are only given single entry visa and they have to get new visa stamp every time. If they do any internship or job, they have to go through a security clearance even if it's a regular internship or non controlled job. It's same for Chinese students.
The only thing my professor complained was getting parents visa was pain as it was always a single entry visa. So he applied for green card for his parents, which they eventually got.
Not taking US side, the only reason I ended up in US was I was from a lower middle class family in India my parent's didn't had funds to pay for my education in US/Canada/UK. I was doing internship in Ericsson Sweden on academic project, in collaboration with US project. And professor ("the Iranian I mentioned") I was working me offered full assistantship (100 % tuition scholarship+ monthly stipend) if I apply to his university with him as advisor. Otherwise, I too had a negative perception about US being bigoted country.
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