This study focuses on developing a competency model for project construction team and project control team service, which are the essential responsibilities of construction companies, in order to provide a basic framework for manpower development including employment, education, performance measurement, and organizational ability improvement. Together, these attributes comprise the basics of human resource management and reflect the key characteristics of construction companies. This study analyzed several previous competency model studies, and derived job competency items from a questionnaire-based survey of corresponding job performers centering on various existing competency items established with respect to the characteristics of construction companies. In addition, through interviews with a specialist group, this study derived weights for setting competency levels and facilitating competency evaluation and formulated a project construction team and project control team affair competency model for construction companies. This study tested the validity of the formulated model by analyzing its correlation with the performance of actual construction projects.