While dealing with quality and unhealthy competition practices at national level, adaptation of Indonesian construction companies’ effectiveness strongly depends on the nature of the corporate culture. The purpose of this paper is to determine the current and preferred culture profiles of sample construction companies in Indonesia. The research has been conducted using the Organizational Culture Assessment Instrument (OCAI) in the construction companies located in North Sulawesi Province. The findings show that, on average, the sample contractors currently function with domination of the Market type of culture, while Clan has been identified as the preferred culture. A matrix has been developed with respect to the applicability of culture profiles as it relates to organizational leadership, organizational effectiveness, human resources management roles, and quality strategies of the respondents’ companies. The value of the paper is the novelty of findings regarding the existing and preferred culture profiles, which have the potential to strengthen competitive capabilities, employees’ motivation, and customers’ needs among the construction companies, and effectiveness of the contractors’ performance in the country with rich national culture. These findings should help reinforce the need for Indonesian contractors to end current bad practices, and gain benefits from the values of dominant culture profile as to become a reputable construction industry.