Go to the "Settings" from the left navigation bar.
Click on the "Company Information" on top.
Edit your company's hierarchical structure from the left section. You can add more structure to your company by clicking "+".
Add the units required for your company structure by clicking "Add New" on the right.
Define the career information of your employees by reviewing this link to make your company structure functional.
Keywords: company information, company structure, unit add, units.