In the relationship among a PEO, a worksite employee, and a client company, there exists a co-employment relationship in which both the PEO and client company have an employment relationship with the worker. The PEO and client company contractually allocate some and share other traditional employer responsibilities and liabilities. The PEO assumes responsibility and liability for the "business of employment" such as risk management, personnel management, human resource compliance, and payroll & employee tax compliance. The client company manages product development and production, marketing, sales, and service. The PEO assumes and establishes an employment relationship with the worksite employee and provides a complete human resource and employee benefit package.