The US intelligence agencies would have a hard time planting employees in US firms while remaining within the bounds of FISA. They certainly have assets inside major Chinese firms though, of course.
I sincerely doubt anyone gives a shit about whatever "FISA" is, sounds like a credit card company or a shoe brand tbh.
Why do you doubt that? And who do you suppose wants to work for the CIA in this aspect, when the job description is pushing pencils as an intern at a tech company trying to get sad old men to have sex with them?
I can’t tell if this is excellent sarcasm or complete ignorance.