Despite the claim that corporate social responsibility (hereafter CSR) is no stranger to many companies even these companies in emerging countries like Vietnam, most of the existing studies only concerned with the benefits arrived from external factors such as the customers' appreciation, media, brand image and so on. Besides that, to take advantage of competition, Vietnamese companies have demanded employees' extra role behavior or organizational citizenship behavior (hereafter OCB) that goes beyond employees' contract such as employees' commitment and engagement to achieve sustainable development. However, it is still unclear how employees perceive organizational CSR efforts and whether such perceptions bring employee reactions. The purpose of this paper is to contribute to filling this gap by looking into the relation between CSR and employees' organizational commitment and engagement and organizational citizenship behavior (OCB). To answer these timely inquiries, we hypothesize that the internal processes based on CSR, employees' organizational commitment, engagement, and organizational citizenship behavior (OCB).