Is there any way to create Subsidiary Supplier Company as supplier site of the Parent Supplier Compa

We have a scenario where Parent Supplier Contact user will be the Point of Contact for Parent as well as all Subsidiary Supplier Companies. We do not want to define same Contact for all other subsidiary supplier companies hence we are first trying to find out if we can make all subsidiary suppliers as Supplier Site of the Parent Supplier Company. Please let us know how it can be achieved. Thanks for your help.