Managing cultural diversity remains a challenge in secondary schools in Spain. In this paper, we approach cultural diversity from the standpoint of school counsellors, who are key professionals attending to immigrant pupils. Through the use of qualitative research techniques (semi-structured interviews and discussion groups), the strengths, weaknesses, opportunities, and threats are identified by counsellors. The findings show the need to implement pupil-focused responses sensitive to their cultural identity and based on the collaboration of all agents involved. Likewise, the school is defined as a privileged setting in which to celebrate cultural diversity and the pivotal role that counsellors play in this process is highlighted.