[derefr]

If you're a US citizen, the US government already knows enough about you from just your regular stream of activity that makes its way to them—your taxes, any times you've been arrested, etc. So—even disregarding stuff like Prism—they already have a baseline estimate for how trustworthy you are, without needing to do a background check. (Also, they can rely on other partial background checks you've passed in the past, if they have access to them. If you've ever worked with children, or gotten a NEXUS card, they already have all the information they need to determine whether you can work a government job.)

The same cannot be said of foreign citizens (even ones who are permanent residents); to the government's eyes, they're "opaque"—and even background checks run on them would only turn up what their homeland wants the US to turn up. (A background check that could turn up more, wouldn't really be a "background check" any more, but rather espionage, since they'd need to bypass the "public API" of the other government.)

[icedchai]

Not really, otherwise they wouldn't bother doing background checks for security clearances. Some of them are extensive. They interview your friends.

[derefr]

A security clearance requires that the government know more about you than just the background-level life events of yours that they passively subscribe to.

All they need to know for a plain-old no-clearance public-servant position is that you're not beholden to a foreign power (e.g. part of a foreign gang, or in debt to a major foreign corporation.)

There's an easy (though imperfect) heuristic for determining whether you're potentially beholden to a foreign power, from the data they already have: the addresses you've lived at, your job history, and your arrest record. Just join that set to the set of organizations they're tracking as catspaws for foreign powers [and their active locations], count the joined rows, and you have a log-probability that you've ever had the opportunity to interact with someone who might have had cause to convince you to work for a foreign power.

[icedchai]

This sounds too simplistic. There are other factors, like large debts (domestic, foreign, or otherwise), extra-marital affairs, etc. that could make someone easy to turn in the future.

[24gttghh]

At this point I think it depends on what type of security clearance you're talking about now. The above sounds more like checks done for a CIA analyst than for a embassy drywall contractor...

[maxlybbert]

I didn’t work for the government directly, and I don’t want to sound like I was doing anything covert or especially difficult. Basically, the company I worked for knew the government was one of its biggest customers with some unusual requirements compared to other customers (not “we need to spy on people,” but more like FedRAMP), and we helped other teams implement those feature requests.

But it was the federal government that insisted that we be US citizens. As far as I know, they didn’t require us to pass any special background check. And they didn’t require us to have any special training. But we absolutely had to be citizens (not just “legally able to work in the country”).

[0xffff2]

It's interesting how broad and disjoint the US Federal government is. I'm a Federal contractor and while many of my coworkers are not US citizens, the government does do a quite thorough (non-clearance) investigation on all of us that involves filling out a rather long form, providing past addresses and contacts for each of those addresses, etc. AFAIK they don't do in person interviews for non-clearance background investigations, but they do send out questionnaires by mail to all of the people you list on the form.