The Information Technology (IT) departments in nearly every business unit play important roles. Managers must anticipate potential problems of key factors affecting performance. This study explores performance influencing factors and establishes a performance model for comparing performances of technician in Taiwanese public and private colleges (i.e., non-profit organizations vs. profit-making enterprises), respectively, along with the relationships among performance influencing factors. Results suggest that task-technology fit (TTF), core competencies, and professional involvement determine technicians' performance along with technology characteristics. Technician's motivation for achievement motivation and personality traits significantly affect the degree of job involvement and core competency.