Org Chart, filter by selection

Hi,

I am trying to build an organization chart. I have 2 columns, Job_Id & Supervisor_Id.

The visual does not allow me to filter/drill based on any member in the organization.

The reason for this is that the SupervisorId at the highest level should be blank or null, for an org chart to display'

Is there a way to blank the supervisor column when a selection is performed on the job title slicer.? 

Here is the sample https://drive.google.com/file/d/1k5Q_coMMhG9E8rPWwAVol9nWYMrN7ZBx/view?usp=sharing

Thanks,

Brian