The purpose of this study aimed to establish indexes of 'Required Personality Traits of a Technician for Automotive Mechanic'. Seven personality domains were developed that included influence, self-drive, self-Awareness, socialization, thoroughness, self-management ability, and psychological adjustment, meanwhile, each domain contained six indices as an initial step. Those indices were reviewed via a developed Delphi questionnaire with two surveys. Experts were composed of nine scholars and administrators respectively. The final indices consisted of forty-six items from Execution Ability, Loyalty, Self-Management, Self-Drive, Communication and Coordination, Psychological Adjustment, Influence, and Tolerance.