In addition, a growing number of centers (18-20%) are now run by health centers or doctor groups, who utilize or employ their own center and administrative personnels or use existing service provider centers to serve the worker population. Finally, an increasing number of employers are taking part in shared, multi-employer clinics, located either on one employer's area or centrally located.The vendor will construct, staff and manage the facility either at the request of a group of employers or will get employers in a specified geographical area. Regardless of the model used, it's crucial that company stay taken part in supplier selection, center oversight, tactical and policy instructions. Staffing practices differ from one onsite clinic to another, though over 60% of centers are led by a Nurse Professional or Physician's Assistant.