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SOI is a leading Professional Employer Organization (PEO) specializing in human resources, employee benefits, and risk management services. Active in the professional employer services industry since 1990, SOI has emerged as one of the leading PEOs in the United States. For small and medium-sized employers in select industries, we serve as a trusted partner and function as a comprehensive, integrated human resource department. Our concept facilitates our customers' access to beneficial resources and connections to "blue-chip" service providers otherwise out of reach. Our team of skilled professionals provides expertise in human resources and compliance, risk management, employee benefits, payroll processing, and information technologies. SOI is based in Charlotte, North Carolina and supports tens of thousands of worksite employees within our customer locations throughout the United States. Take a few moments to explore our site, and find out more about what SOI can bring to your business.