The Occupational Safety and Health Administration, or OSHA, was created by President Richard Nixon in 1971 to assure safe working conditions for men and women by enforcing standards and providing training, education, and assistance.
OSHA requires that employers provide their employees with working conditions that are free of known dangers. They are also in charge of creating the standards that define a 'safe workplace'.
OSHA is a part of the US Department of Labor. The OSHA administrator is the Assistant Secretary of Labor for Occupational Safety and Health. They answer to the Secretary of Labor, who is a member of the President's Cabinet.