Mary Jones
It is Sylvester Monye
chief adviser
Yes
a Dr. and adviser to president of Sierra Leon
secretary of labor
Rodney Bearden from Dalton Georgia served as a Economic adviser to George w. Bush in 2001
Presidents often have numerous individuals with whom they consult. In President Roosevelt's case, his closest adviser was Harry Lloyd Hopkins.
How many did president Henr Konan had
NSC adviser
Henry Kissinger
A chief foreign affairs adviser in an officer who works closely with the process in formulating foreign relations policy. He also advises the president on actions to take in dealing with a crisis overseas.
To my knowledge, the U-S Constitution does not mention anything about an advisor to the President. It merely lays out the President's powers and responsibilities. How the President achieves those things is up to him or her.