Build a Staffing Agency portal with separate Content management

PLEASE READ BEFORE BIDDING AND ANSWER OUR QUESTION We Have Create a Staffing and Consulting Agency based in Germany, We specialized to Find Medical stuff for Hospitals & Clinics (Doctors And Nurses). Our employee was also from Germany! But it is getting more and more difficult Qualified staff in Germany to be found, although they're very well paid! That is why we decided to carry out our search for qualified staff in other European countries! We have contracts with people in different countries which should work for us as self-employed recruiters. If the found doctor or nurse signs a firm contract with our client (hospital), then our foreign recruiters would get 25% commission from us! We get our money from our clients (hospitals) only if we bring qualified personnel to work That's why we do not want the recruiters or staff to have any direct connection with our clients! We need also an Separate Content Management System , Please explain us: A. How would you solve this , and how would be visible to the homepage B. worldwide such Database are at separate server with a separate id, Would be a separate Admin Login , or would be at the same portal? How can you solve this ?