Citizen, background checks, and for DoD, secret accreditation. So the chance of a Russian employee working on a DoD project are non-existent.

You know, MDA had non-citizens working on American spy sats for quite some time... Just look at their linkedins. I don't think a man who graduated Peking university on a full time program, can become a Canadian/US citizen the next year, when he joined MDA.

Quite a lot of those guys are on work permits in Canada.