Hello Michael and Bill,
Thanks for the replies.
I haven't explored the VLAN capabilities of ZD and ZF and I myself need to understand more VLAN concepts. I am attaching a diagram for better understanding.
All of the switches are VLAN-aware but I don't have management control. In the diagram I only have control over the ZD, ZF and Juniper router. Yes the two networks don't cooperate, they are managed by two different groups.