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PAYX: together with its subsidiaries, provides payroll, human resource, and benefits outsourcing solutions for small- to medium-sized businesses in the United States and Germany. It offers payroll processing services, which include calculation, preparation, and delivery of employee payroll checks; production of internal accounting records and management reports; preparation of federal, state, and local payroll tax returns; and collection and remittance of clients' payroll obligations. The company also provides payroll tax administration services; employee payment services; and regulatory compliance services, such as new-hire reporting and garnishment processing. Its human resource outsourcing services include payroll, employer compliance, human resource and employee benefits administration, risk management outsourcing, and the on-site availability of a professionally trained human resource representative. In addition, the company offers retirement services administration; workers' compensation insurance services; health and benefits services; time and attendance solutions; and other human resource services and products. It also operates a professional employer organization.

CDI: provides engineering and information technology outsourcing solutions and professional staffing services primarily in the United States, the United Kingdom, and Canada. It operates in four segments: ES, MRI, Anders, and ITS. The ES segment provides engineering, design, project management, professional staffing, and outsourcing solutions to oil, gas, refining, alternative energy, power generation and energy transmission, nuclear, chemicals, and heavy manufacturing industries; engineering, design, and logistics services to the defense industry, primarily in marine design, systems development, and military aviation support; and a range of engineering, design, project management, professional staffing, and outsourcing solutions to the commercial and military aerospace markets. This segment also offers facility design, project management, engineering, professional staffing, and facility start-up services to customers in the pharmaceutical, bio-pharmaceutical, and regulated medical services industries. The MRI segment operates as a global franchisor that does business as MRINetwork and provides the use of its trademarks, business systems, and training and support services to its franchisees who engage in the search and recruitment of executive, technical, professional, and managerial personnel for employment by their customers. It also provides training, implementation services, and back-office services to enable franchisees to pursue staffing opportunities. The Anders segment provides contract and permanent placement candidates to customers in the infrastructure environment seeking staff in building, construction, and related professional services. The ITS segment offers various information technology related services, which include staffing augmentation, permanent placement, outsourcing, and consulting.  

BBSI: provides human resource management services to small and medium-sized businesses primarily in California and Oregon. The company offers professional employer organization and staffing services. Its human resource management services include payroll and payroll taxes, employee benefits, health insurance, workers' compensation coverage, workplace safety programs, compliance with federal and state employment laws, labor and workplace regulatory requirements, and related administrative responsibilities. The company's staffing services include on-demand or short-term staffing assignments, contract staffing, long-term or indefinite-term onsite management, direct placement, and human resource administration services. It serves electronics manufacturers, various light-manufacturing industries, forest products and agriculture-based companies, transportation and shipping enterprises, food processing, telecommunications, public utilities, general contractors in various construction-related fields, and various professional services firms.