Given that the Chinese government uses coercion (esp. threats to family back home) on foreign workers in the US, every Chinese national working at any company in the US can be a potential mole. Think about that.

"If these contractors can't breach a target, intelligence officers assigned to specific cases come into action. They operate on the ground, near targets, by recruiting company insiders, or even coercing Chinese employees to aide their hacking efforts using blackmail or threats against families living at home." [1]

[1] https://www.zdnet.com/article/fbi-is-investigating-more-than...