The Surgeon General's job is to protect and advance the health of the nation by educating the public. He or she advocates for effective disease prevention and health promotion programs.
The White House chief of staff holds a powerful position that is crucial to the success of a president. The chief of staff controls the flow of people and papers into the Oval Office-in effect managing the flow of information and opinion to and from the president.
The press secretary is one of the most visible members of the national government. Appointed by the president, the secretary speaks on behalf of the president and makes sure the president has good relations with the media and the American people.