After difficulties in approving the appointment of a Chair of RTVE, on 19 July 2018, the new government of Pedro Sánchez proposed Mateo as the "sole administrator" of Spanish Broadcasting Company (RTVE), a provisional position to direct the public body until the approval of a new chair and Board by public tender. Her candidacy was approved on July 27 of the same year by the Congress of Deputies, and took office on 30 July. On 26 March 2021, a new Chair, José Manuel Pérez Tornero, was appointed.