When assigning an Applicator, you must choose from your current list of employees. All your Employees will automatically show up on your Applicator drop-down list.  There is no function to add an Applicator who is not  an Employee, therefore a new Applicator must be added as a new Employee. To do so, navigate to the My Company section of the Sitemap -> Employees -> Add, and create a new Employee. 

In addition, you can set the License/Certification # for the employee in the employee’s detail view.