An employee can create Positions from Manage Position and Manage Data, but he/she does not have "Add Position" option available in Position Org Chart.
Employee Central: Position Management
This is because the user does not have sufficient RBP.
The following permission is needed under Manage Position RBP table.
Also, make sure that the user has permissions for creating Positions.
When these permissions are given to a user, the user will have the option for adding positions in Position Org Chart.
RBP PERMISSION ROLE_BASED_PERMISSION , KBA , LOD-SF-EC-POS , Position Management , LOD-SF-EC , Employee Central , Problem