A high percentage of security jobs in the U.S. are government positions. If you can't get a clearance, you can't get a job. It is far more difficult for a foreign national (especially from a place like India) to get a security clearance of any sort, let alone the Top Secret clearance that most security roles would demand.
That's not to say that it's impossible though.
Also, unless I'm mistaken, securitytube.net is owned by Indians. It's a great site and the instructors for their courses are indeed experts.
So are all computing security jobs tied to the U.S.? I can think of Avast in the Czech Republic and Kaspersky Lab in Russia off the top of my head, there's probably a lot more out there.
Obviously not all of them, but these companies you mention have no real interest in dealing with this kind of advanced malware. What they do is build a software product aimed at home/small business consumers. AV products can't do nothing to prevent sophisticated malware from being injected in the system through 0-day vulnerabilities. As I understand it the only interest in analyzing this kind of malware is merely for research purposes, maybe trying to find a way to detect similar patterns from various infections so as to try and develop some product for governmental organizations and high-stakes businesses.
Obviously not, but the article was written from the perspective of the western world, and so I answered the question in that context. There are security experts and security companies in most civilized nations.
That's not to say that it's impossible though.
Also, unless I'm mistaken, securitytube.net is owned by Indians. It's a great site and the instructors for their courses are indeed experts.