Sustainable growth of the organization under severe competitiveness needs to understand its
organizational culture since, for the improvement of organizational effectiveness, it not only explains its
members’ attitudes and behaviors but also affect organizational change including organizational redesign and
innovation in the long run. The research tried to figure out the factors that affect organizational culture and
organizational effectiveness using Structural Equation Modeling in the government company. The results
are as follows. First, there were close relationships among leadership factor and culture factors. Second,
leadership affected organizational culture and organizational effectiveness. Third, organizational structure was
not statistically significant to the organizational culture and negatively affected organizational effectiveness.
From these results, the research revealed that organizational culture and effectiveness would be more
improved if leaders show their leadership more effectively.