>Or, What about if one of their employees is married (or wants to get married) to a legal resident of one of these countries? How far removed does the employee

>Or, What about if one of their employees is married (or wants to get married) to a legal resident of one of these countries? How far removed does the employee have to be from this risk? Security clearance background checks will cover this sort of thing. For sensitive government contract work, clearances are generally required for the relevant contractor employees. For non-government customers who still have these concerns, I’m not sure there’s a good answer. I guess you could define your own clearance process and run similar background checks - many of the government’s own background checks are done by private investigators already.