International non-profit organizations (INGOs) were traditionally established to facilitate dialogue and bridge cultures. In order for INGOs to successfully carry out their objectives, global activists must work together in a culturally sensitive and responsible manner. The current article examines a volunteer training model that was designed to promote meaningful interactions between binational volunteers. The training, based on a Spanish-immersion and homestay experience, was piloted among volunteers at an INGO on the Mexico-US border. Results suggest that the immersion training model allowed volunteers to reassess and ultimately strengthen their relationships with their international counterparts while developing intercultural citizenship skills.