As chapel master, he was in charge of the education of choir boys and apprentices, besides conducting the cathedral liturgical music.
On the occasion of the ceremonies that elevated the Bishopric of Guatemala to the rank of an Archbishopric, Quirós provided liturgical music during the nine days of celebration in November, 1745.
Writer Antonio de Paz y Salgado, a high official in the Spanish colonial government, published his enthusiastic review of these musical performances two years later in Mexico City.
A considerable number of Quirós' works are contained in the archive at Guatemala Cathedral.
Besides arranging a sizable amount of music sent from Spain, Lima, and Mexico City, Quirós also provided a number of original villancicos, sacred songs, and cantatas for matins of different feasts of the Catholic year: