In addition to his activities as composer, performer and teacher, Ernesto Cordero was music director since 1980 to 1997 of the International Guitar Festival of Puerto Rico.
To date, there are more than forty recordings of Cordero's works, and most of his several dozen compositions have been published under the banners of leading publishers, for example Max Eschig (France), Bèrben (Italy), Chanterelle, Antes Edition and Hubertus Nogatz (Germany), Doberman-Yppan, Les Productions d'Oz (Canada), Mel Bay Publications, Boosey & Hawkes, Éditions Orphée, Falls House Press, and Michael Lorimer Editions (USA).
The colorist variety of his playing is also extensive, and the subtle interplay of tonal nuances gave each piece a solid musical profile as well as supplying a beguiling sensuous wash of sound".
Ernesto Cordero's countrymen Iván Rijos, Leonardo Egúrbida, Juan Sorroche and José A. López have all performed his concertos, as have leading international performers including Angel Romero, Carlos Barbosa Lima, Manuel Barrueco, Costas Cotsiolis, Eduardo Fernández, Pepe Romero, Alírio Díaz, Carlos A. Pérez among many others.
The Concierto Antillano has been recorded three times, first by Costas Cotsiolis and the Philharmonic Orchestra of Liège, directed by Leo Brouwer (Música Viva MV 88.045), later by Carlos Barbosa Lima (Concord CCD-42048-2), and more recently by Angel Romero who made a video of the Concerto (Corporación de las Artes Musicales).