Espinosa de los Monteros worked for different radio stations in the cities of Ibarra and Guayaquil until 1962. In 1963 he was news director for Radio La Prensa. He began in Ecuavisa in 1967, the year of its foundation, as the first news anchor of the station. He was News Director for almost three decades. He hosted the Ecuadorian version of "Who wants to be millionaire" (2001 - 2004 and 2009 - 2011). He received the “Honorato Vázquez” medal from the Ecuadorian government in 1992.