Without separating the branches into separate views, and tying them together via a dimension, I am not sure how you could accomplish this within a single sheet. Currently, there is no dimension that would connect the branches together, even if you separated out each piece of the org chart -- you'll need a field that is common between drill down paths in order to make this work and I do not see that in the current data set.
Hopefully this makes sense - let us know what you come up with!
below is little similar to my requirement, it has three levels. But i'm looking for 4 levels ,
when we click on 3rd level employee then his reports should show up as 4th level and at same time all 3rd level employees and their managers(all indirect manager) should be there in chart.
yes, data structure should change.