Administaff is one of the leading professional employer organizations in the United States. It serves as a full-service human resources department for small and medium-sized businesses. The company specializes in employment administration, government compliance, recruitment and selection, and training and development services. Administaff offers a range of performance, benefits and employer liability management solutions. It is a publicly traded business that provides services for more than 6,200 clients. The company also utilizes the Personnel Management System. Administaff s Employee Service Center features an e-commerce portal from the MarketPlace brand. The company is a member of the National Association of Professional Employer Organizations (NAPEO).