[bogomipz]

The President's cabinet are all heads of departments in the Executive branch. They are advisors and implement policy. The word Secretary in a "Secretary of ___" cabinet title is not at all the same as an "office secretary" where duties might include scheduling, answering phones and ordering office supplies. Not even close.

By contrast he Chief of Staff in the White House is a cabinet-level "Official" and it's not even a requirement that the President have one. That should be an indication:

>"The duties of the White House chief of staff vary greatly from one administration to another and, in fact, there is no legal requirement that the president even fill the position. However, since at least 1979, all presidents have found the need for a chief of staff, who typically oversees the actions of the White House staff, manages the president's schedule, and decides who is allowed to meet with the president."[1]

[1] https://en.wikipedia.org/wiki/White_House_Chief_of_Staff