All of the comments taking umbrage that the article isn't celebrating Snowden's character are missing the point. While it is entirely possible that he was qualified or even overqualified for the position he had at Booz Allen Hamilton, nothing in his resume suggests that which raises the question who else has access to sensitive data and secrets? The answer could be that Snowden was an exceptional individual and that'…
As I understand it security clearance screening is done by blacklisting, not whitelisting. That's what would make sense for a nation with due process, but it does lead to increased risk of leaks from people with no obvious red flags that come up during the background check or in-person interviews.
I still think the article makes a good point though, you just don't know who the hell has access to your data unless you keep it on your own servers or host the data in a country with extremely transparent privacy and law enforcement governance.