Joseph biden family photos

While Inauguration Day marks the transfer of power from one president to another, it also marks another major change at the White House: one first family moving out and another moving in.

This final piece of the transition happens behind closed doors, no cameras allowed.

The residence staff of the White House will be working furiously Monday on deadline to move the Bidens out and the Trumps in.

Gary Walters, the former White House chief usher for 21 years who attended five presidential move-in days, told ABC News the process is "organized chaos."

According to Walters, the activity inside the White House is a well-organized ballet with "choreography that has to be minute-by-minute."

Walters served seven presidents and first families at the White House, including during the Reagan, Clinton, and both Bush administrations.

"We have approximately five, five-and-a-half hours from the time they