Accounts Across All Organizations

Hi guys,

In our environment we have accounts which belongs to Default Organization.

And we have internal Divisions and employees belongs to that Divisons.

We need to show all the accounts to all the employee, but it is not possible because employees & their positions belongs to Internal Divisons.

And they will be able to see the accounts which only belongs to their Divison or Org.

How can we makechanges to show the accounts which belongs to Default Organization which is super to All Internal Divisons or Orgs.

Thanks

Sekhar