The Department of Labor supports whistleblowers and offers specific protections for them in many industries. The main act that provides this protection is the Occupational Safety and Health Act, but there are also specific provisions for certain industries, such as the Asbestos Hazard Emergency Response Act (AHERA) or the International Safe Container Act (ISCA).
Through these acts, the government has established that whistleblowers who report on unsafe workplaces, sexual harassment and other such issues cannot be discriminated against in the workplace simply for making these reports. They cannot be fired from their positions on those grounds. They must be treated fairly.