The title of this article is a manipulative propaganda.

If you don't bother reading it, it suggests that Edison hired people on H1B as their own employees and then fired existing employees.

The facts in this article are that Edison fired some IT employees and instead hired contractors from Infosys and Tata.

Those contractors are employees of Infosys and Tata, they don't work for Edison. Implying that they do is the first attempt at misleading readers.

Another fact is that some of Infosys and Tata US employees are H1B visa holders.

So it's possible that some of those H1B holders will end up working but the article doesn't actually make that statement other than a hearsay (a statement made by someone (in this case apparently an Edison worker being laid off) but not verified by the "journalist" writing the article) i.e. it's quite possible that none of the people who will replace Edison employees are on H1B.

We just don't know and the article either is so poorly written as to hide the facts behind the headline or is maliciously or incompetently distorting the facts.