This study described the psychological experiences of the Moro National Liberation Front (MNLF) integrees within the Armed Forces of the Philippines. The study explored the relationship of perceived discrimination and integrees’ well-being. The research also determined if collective self-esteem, social support, and locus of control are potential mediators in the discrimination well- being relationship. Finally, ethnic density was also considered if it affected their well-being. There were 98 purposively sampled Muslim integrees who answered questionnaires. Results showed that discrimination is associated with well-being. Collective self esteem and social support are mediators in the discrimination well- being relationship. Lastly, data revealed that the integrees’ well-being is also linked with the ethnic density of their location. Contrary to prediction, results show that Muslim integrees in a predominantly Christian community achieved higher levels of well-being.