Optimizing the you Project Setup

My Fellow Clarizen Users:

I am looking for guidance and assistance on the best way to setup a complex project that has multiple sub-projects in the best way to provide executive level reporting.  For example: I am moving a program and the services provided to customers from one service provider to another service provider.  There are a total of 25 customers impacted that will also need to be transitioned to the new service provider in addition to moving the services.  Thoughts and recommendations are welcome.