It is possible as an admin to edit or remove an employee. Just go to your companies' management dashboard and click on employee management to see this screen:

Here, you can choose an employee that you want to edit or delete by clicking on its name. When clicking on the pencil in the right corner you can start editing the specific and training skills of the employee, the department, email address, and mobile phone. To delete an employee you scroll all the way down to find the button called "delete employee"