As an aging society with declining birth rate, the re-use of mature employees becomes an important issue for companies. At present, the study of mature employees considers separately either the human resources re-sue or career development of mature employees. We integrate the two one-sided views while conducting a case study of semi-structured interviews; we integrate the career planning with organizational development demand patterns for mature workers in the company. We find that the case company can make use of mature employees' advantage of professional skills and experience, and can deploy an effective re-use strategy through position re-arrangements and redesign in human resources management. These practices effectively enhance the value of mature employees.