In addition, a growing number of clinics (18-20%) are now run by hospitals or doctor groups, who use or hire their own center and administrative personnels or make use of existing service provider facilities to serve the staff member population. Lastly, an increasing number of companies are getting involved in shared, multi-employer clinics, located either on one company's location or centrally located.The vendor will develop, staff and manage the facility either at the demand of a group of companies or will obtain employers in a defined geographical area. No matter the design utilized, it's crucial that employer stay engaged in service provider selection, center oversight, tactical and policy instructions. Staffing practices differ from one onsite clinic to another, though over 60% of facilities are led by a Nurse Practitioner or Doctor's Assistant.