Why do most of technology companies in the USA require US citizenship to their new hires?

It seems that companies that directly or indirectly provide services to the US government are required to have employees that are all US citizens. Why? What if you some person is the next Novel Prize but has another nationality? Is this person eligible to work in technology companies the USA?Why do most of technology companies in the USA require US citizenship to their new hires?
Because they have to be able to show that the person has an extreme interest in holding details of the job private. To get a security clearance for an employee costs the company a lot of money and they are not going to waste that money filing for someone that may not be granted the clearance. If there is an expert in a field there are ways to get permissions to hire someone that isn't a US citizen but that is extremely expensive and they would only do it for people that are world experts in a field.
Better safe than sorry, I always say.



The reason being ... due to the highly sensitive nature of the products being developed it is essential to have employment practices that do not include individuals who may have a vested interest in corporate espionage or (worse) governmental espionage.



Example; Chinese are typically very intellectually and technologically gifted people but we all know that Chinese "pirates" have been stealing intellectual property for years, as we hear about it weekly.



While it's true that nearly anyone from any walk of life can be tempted by greed, I suppose that greed coupled with loyalty to a foreign interest could be a far more lethal cocktail.Why do most of technology companies in the USA require US citizenship to their new hires?
Because you may be seeing your new technology heading overseas when the person returns.

If they have citizenship, they are less likely to leave with all the technical plans in their heads to

enrich another country.
.....and it is NOBEL prize--not novel





what your dealing with here is business at a global and international level owned by corporations----they may hire and fire whom they please.....Why do most of technology companies in the USA require US citizenship to their new hires?
Its cheaper to hire US citizens But when you get to the upper echelons of expertise

most corporation hire head hunters to find the people they need worldwide
Security, the govt and many other firms require US hires only.