[1] After graduating from the since-demolished[2] Enrique Finot high school in Santa Cruz, Zambrana attended the Gabriel René Moreno Autonomous University (UAGRM), where he studied accountancy.
His poetic output consists mostly of formal verse in rhymed quatrains composed in styles reminiscent of sung folk music associated with eastern Bolivia, in particular the taquirari.
His poems often make use of, for example, regionally restricted terms for natural features and distinctive elements of local culture; instances of eye dialect indicating that the speaker is to be read as pronouncing words in a manner characteristic of residents of the department of Santa Cruz, such as replacement of standard Spanish ⟨s⟩ with ⟨j⟩ word-finally; and words formed from application of distinctively eastern Bolivian suffixes such as diminutive -ingo/-inga.
[1] In addition to his writing, Zambrana has acted in regional theatrical troupes and was a longstanding member of a local choir.
[1] Romancero oriental (1978) Romancero cruceño I (2000) Romancero cruceño II (2000) Zambrana's poems "A Santa Cruz," "El carretón de mi tierra," "En la tranquera," "Leña en carretón," and "Rondel de la morochinga" were selected for inclusion in the Internet archive Soy Santa Cruz as pieces deemed illustrative of the cultural heritage of Santa Cruz, Bolivia.