Her best-known composition was the Spanish-language opera Doña Bárbara performed in the Teatro Municipal of Caracas, July 1967.

Other compositions include works for voice, solo piano and chamber ensemble; of note is the Seis canciones de los paises bolivarianos (lit.

[3][4] In Caracas, Lloyd was musical director of El Centro Venezolano Americano (the Venezuelan American Center) from 1955 to 1968.

[2] Based on the eponymous novel by Rómulo Gallegos, the Venezuelan writer Isaac Chocrón wrote the libretto, while American arranger Hershy Kay orchestrated the work.

[1][2] After returning to the US, Lloyd studied at Columbia University with Donata Fornuto, Arpad Szabo and Charles Wuorinen.