I think you would be able to satisfy the requirement by adding the database query call in an appropriate user exit - which exit exactly depends on what platform you are using (.Net or Java) and whether you have a table of employees per page/screen or just one to display.
That is, from the ApplinX point of view you are just looking for where to modify the data being displayed on the web page. I don’t think this would be achieved through a transform, but through a generated code-behind.
#ApplinX#webMethods#Mainframe-Integration