In addition, a growing number of clinics (18-20%) are now run by medical facilities or doctor groups, who use or hire their own clinic and administrative staffs or utilize existing service provider centers to serve the employee population. Lastly, an increasing number of companies are taking part in shared, multi-employer centers, situated either on one company's area or centrally situated.The vendor will develop, personnel and manage the facility either at the request of a group of companies or will solicit employers in a defined geographical area. No matter the model utilized, it's key that employer remain engaged in provider selection, center oversight, tactical and policy instructions. Staffing practices differ from one onsite center to another, though over 60% of facilities are led by a Nurse Professional or Doctor's Assistant.