President meets with Secretary of Defense. President Kennedy, Secretary McNamara.
A secretary is a person who is employed to help in an office, and help the people in charge of the office do their job.
By definition, the main task of a secretary is to keep organized paper and electronic files for the business, school, hospital, or government agency they work for. Other common jobs that secretaries do are answering telephones; typing and writing letters; plan and schedule meetings with guests; and manage the website of their office.