see, these people are not that smart, actually
Edit: grepping Wikipedia for “mole” it does appear that there was an Iranian one working with the Dutch government.
https://www.fbi.gov/news/speeches/responding-effectively-to-...
Has Lucid Motors's founder (former Tesla employee) conducted economic espionage or is it simply capitalism working as intended?
You may wish to ask Nortel about that:
* https://www.bnnbloomberg.ca/did-a-chinese-hack-kill-canada-s...
* 7m ago: https://news.ycombinator.com/item?id=23743869
There's a long list of criticisms against Huawei:
https://www.theguardian.com/technology/2010/jul/14/russian-s...
I think the main way to prevent issues is to just assume at any time you could be infiltrated. Don't mistrust all your employees, but don't live with lax security policies that allow a person to get away with something undetected.
Audit trails are important, as is, um, not giving read access to user data without really really good justifications. Even beyond espionage, employees could stalk personal contacts (as happened at Uber in 2016 and Facebook in 2018).
The FBI gave some examples in their published literature on the topic.
https://www.fbi.gov/file-repository/china-risk-to-corporate-...