Guarionex Morales-Matos is a Puerto Rican composer, as well as founder and co-director of Orfeón San Juan Bautista, a professional secular choral ensemble. His catalog spans numerous works, focusing primarily on the a cappella medium. He has also written art songs, choral-instrumental works, film music, a ballet and a symphonic piece. Morales-Matos’s music has been performed in Spain, Italy, France, Austria, Poland, Mexico, Venezuela, Colombia, Cuba, the Dominican Republic, Canada and the United States of America. Other collaborations include endeavors and commissions with the Vassar College Women’s Chorale, the Elm City Girls’ Choir, Seraphic Fire (U.S.A.), Exaudi (Cuba), the Central University of Venezuela Chorus, and the plastic artists Allora & Calzadilla.

In 2015 he published "La influencia de la música popular en Ernesto Cordero, músico puertorriqueño, caribeñista y latinoamericanista: obras compuestas entre 1967 y 2015", a catalog that encompasses the composer’s complete works alongside a historical and stylistic analysis of his pieces. Also in 2015, the Institute of Puerto Rican Culture published "Música popular puertorriqueña: adaptaciones corales" and "Composiciones corales originales (1994-2014)", an edition in two volumes that compiles fifty-nine choral arrangements and original compositions.

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