He then enrolled at the Universidad Nacional Autónoma de México pursuing a degree in medicine, but discontinued his training there for health reasons.
On a scholarship from the Puerto Rico Department of Public Instruction, Campos Parsi studied at the New England Conservatory in Boston.
During the summers of 1949 and 1950 he trained with various composers including Aaron Copland and Serge Koussevitzky,[3] and between 1950 and 1954 Campos Parsi studied with Hindemith at Yale University and with Nadia Boulanger in Paris.
He also contributed articles for The San Juan Star, The Puerto Rico World Journal, and La Torre, a magazine that he headed himself.
[3] Among Campos Parsi's last compositions for orchestra were:[3] For the theater he also composed the incidental music for both A Midsummer Night's Dream by Shakespeare, and Dracula by Bram Stoker.
However, despite problems with the use and cancellation of accidentals, and the rather stiff pianistic writing, the music contains some interesting harmonic ideas and compelling melodies.
He was resident composer for the University of Puerto Rico at Cayey, and member of the board of directors of the prestigious Fundación para las Humanidades (Foundation for the Humanities).
1–20 Montalvo, José A. Héctor Campos Parsi His Life and Music: A Biographical Study with an Analysis of Four Selected Works.