Álvarez joined Televisión Española (TVE) February 10 of 1957 and from 1958 until 1970 alternated as the host with the editor of the news services, also occupying the posts of Head of the Technical Secretariat of Programs, Chief of the Technical Secretariat Documentation, Editor of the magazine " Tele-Radio" (1958–1960), Head of Children's Programs at various periods between 1970 and 1985 and Executive Producer of cultural programs until 1992, culminating her television career coordinating the production unit for retransmissions of rhythmic gymnastics and handball in the Barcelona Olympics.
Under her leadership, Televisión Española produced and presented highly regarded youth television news programs, theater, literature and sports for children and youth, and imported programs tailored to the audience of his country such as "Sesame Street", "Pippi Longstocking", "The Fraguel", "The Storyteller", European animated short films, and various drama series.
Between 1975 and 1977 Alvarez taught Journalistic Writing in the School of Information Sciences.
She appeared in front of the camera as a presenter for several shows, including the daily TVE newscast "Telediario" (1958–1970), "Weekend" (1963–1964), and "Standard of living" (1968–1970).
Alvarez was co-founder of the Spanish Academy of Sciences and Television Arts and served as a Board member until her death.