These types of employees all spawn naturally in 2.3 except for Hubert.
There are 8 types of employees you can spawn: You can also customize your employees too and clear all employees currently in the map. The Employee Menu has the ability to spawn different types of employees one at a time. These menus can create objects, kick people, and teleport them, so you have to have a lot of trust on a person in order to give them permission to access these.
In-game moderators have access to these channels as well as outside of a VIP menu.
The Moderator Menus are the lowest level of mod menus available to those who have access to mod menus, and can only be accessed by people who have a Moderator rank or higher.