A member of the , Decibe joined the Montoneros for a brief period. During the 1976 Argentine coup d'état, she was detained at the Navy Petty-Officers School of Mechanics (ESMA). Decibe became an advisor to the Argentine Chamber of Deputies's Education Commission in 1989. In 1996, she was appointed minister of education, the third one during the presidency of Carlos Menem. Her predecessor had suggested her name to Menem. However, she resigned from her office in 1999, as a protest to government's reduction in education budget. succeeded her.