There are two ways of doing this, either option is valid.
Set up a new menu profile in security and add to the employees profile.
Add to an existing profile that the employee already has.
The easiest option is to update an existing menu profile, currently assigned to the user. However, all other users assigned this menu profile will then have the same access.
If it's a menu profile for a single user, it is recommended to create a new menu profile and assign this to the user.