All of the following serve at the pleasure of the President and can be dismissed at any time, Exept:

Question

The white house chief of staff
secretary of state
chariman of the federal reserve board
white house press secretary

Answer 1

Although members of the federal reserve board are appointed by presidents with advice and consent of the senate, they may not be removed for policy reasons. This is to insulate their decisions from political pressures.

Answer 2

Thanks Damon