Since 9/11, Muslim students are easily grouped and engaged each other to share knowledge, resources, and soft skill, as a response to reject negative stereotypes from their surroundings. This study aims to analyze the engagement of Muslim students to their organizations based on personality and intrinsic motivation. A comparative study using consecutive sampling between two groups of student organizations; public organization (PO) and religious organization (RO). Personality traits were measured using a big five personality construct with 12-items Newcastle Personality Assessor (NPA-12). The engagement was measured with the 12-items engagement questionnaire (ENG-12). Both questionnaires were validated and reliability tested in Bahasa Indonesia. Intrinsic motivation about the organization was elaborated through essays in three questions; expectations, facts, and future plans. The confidence interval was 95%. Questionnaires are feasible to be used in this study. The number of engaged students between the two groups was significantly different, PO members are more engaged than RO. Engagement in both organizations is affected by conscientiousness. After intrinsic motivation was added in the regression model, it has a mediation effect on engagement; neuroticism is affecting engagement negatively, while intrinsic motivation is affecting positively. Muslim students are more engaged in public organizations.