Question

Employees who express concerns of unethical or illegal behavior within their companies to outside​ authorities, after attempting to go through normal channels at​ work, are known as​ __________.

Answer 1

they are known as whistleblower.
Whistleblower is anyone that disclose secret information from any establishment that are pretty much illecal/unethical in nature.
In united states, the OSHA ensure that the right and safety of the whistleblowers will always be assured assuming the information is accurate