Yes if you add an image to the employee you can show it with the image viewer in the listview.
Best way to do this is to create an image entity 'EmployeeImage' that is a generalization of system.image. You can link this entity with an association to the employee entity.
If its difficult for you to follow Maarteen ( as you are beginner ) you can generalize the employee entity with system.image and proceed as well.
but the right approach is suggested by Marteen , where you need to add a new entity generalized to system.image and create 1-1 association with the employee entity, and add an image uploader in the Employee details filling section and upload the image. use a list view to display data.