The research interest in this thesis concerns what it means to be and to act as a SENCO. More specifically, the thesis explores nine SENCOs’ lived experiences of agency. To study this, focus has been directed towards existential aspects of their everyday worklife, such as intersubjectivity, corporality, temporality, spatiality and ethics. The research gap this thesis wants to address is further knowledge regarding the professional role of SENCOs in upper secondary schools, with a specific focus on agency.