Unless you are employed by some government systems such as the Postal Service, IRS, Law Enforcement etc. - NO job is secure.
Especially if you are working for a publicly held company, with a single meeting your whole line of work can be eliminated to try and bolster stock prices.

In 20 plus years of business, and as a bloke who runs a company - I can safely say the VAST majority of employees at all levels know very little about the true financial shape of the company they work for, and have no idea of long term ideas and changes that will affect their job - until right up to when the changes are made.