This article aims to show the role of educational counselors both as promoters of cultural management and as mentors for attention to diversity. A qualitative methodology and ethnographic approach have been implemented. In-depth interviews with counsellors from schools in the provinces of Huelva and Cadiz (Spain) have been analyzed in order to pinpoint their perceptions regarding the educational attention that immigrant students receive and the opportunities that are generated from the temporary language adaptation classrooms and school counseling for the promotion of intercultural education. After the qualitative analysis, this classroom stands out as an essential device in the educational response received by these students. The main outcomes also show that the educational counselor is a key figure in the processes of educational attention to immigrant students, although they are faced with some challenges that remain pending in this process. These professionals assume the role of advisers, guides, coordinators, and promoters in the preparation of cultural proposals and actions. Their work is equally relevant in family–school–community mediation and in the positive promotion of intercultural coexistence. The discussion focuses on knowing the importance of intercultural education in schools as a response to the principle of “educating for all,” taking advantage of the educational context as a privileged setting to work on cultural diversity. This task must be carried out by the counselor in collaboration with the principals, families, other teachers, educators, and other agents. The research underlines the difficulties counselors face when implementing inclusive collaborative processes, while identifying them as key agents due to their pivotal role in the positive management of diversity.