Administaff is a professional employer organization (PEO) founded in 1985 that now serves over 6,500 client companies and 108,000 employees nationwide. As a PEO, Administaff establishes a co-employment relationship with its clients to provide comprehensive human resources outsourcing including benefits administration, payroll processing, regulatory compliance, and training and development services. This allows client companies to focus on their core business operations while gaining access to expert HR support typically only available to large enterprises.