Corporate entrepreneurship (CE) is considered as an effective means to support the success of business in a competitive market. Although CE can be a solution for contractors to come up with the right corporate strategy, the concept of CE is very new and there is very little guidance. This paper is aimed at clarifying the CE concept for contractors and identifying key factors for CE in order to enable the implementation. To address this, firstly theoretical concepts and previous research on CE were explored, followed by 19 interviews with top managers of contractors in Indonesia. The data was analysed using thematic analysis to identify the key factors for successful CE in Indonesian contracting business. 21key factors of CE have been identified, which are discussed under five categories: autonomy, competitive aggressiveness, innovativeness, proactiveness and risk taking. All these key factors are found to be related to one another and hence have to be managed as a system for successful CE.