The paper focuses on the study of the non-governmental organizations (NGOs), the person job-fit and the job performance of workers in the NGOs. Literature on non-governmental organization, job performance and person job-fit is examined in order to build the conceptual framework. This paper proposes a conceptual model to further understand the person job-fit in influencing NGO’s worker throughout the job performance. This paper is then developed into concrete research hypotheses for future studies. The model developed is conceptual and quantitative in nature. More research that is empirical needs to be conducted to test for the validity of the formulated propositions. The significance of this paper can be separated into two standpoints. First, the significance of this study can be seen from the theoretical standpoint. Second, from the applied significance perspective, this study is able to provide better understanding on the performance of workers in the service sector within the NGOs context. The definition and model developed for measuring performance can contribute significantly to existing literature on excellence measurement. Further research can help in adding more variables to this measure to make the model a holistic one.