A Spanish sociolinguist and Director of Language Programs in the Department of Spanish & Portuguese, Dr. Guerrero facilitates the department’s practicum seminar on language pedagogy, as well as workshops on Spanish heritage language speakers. He supervises the department's language instructors who teach classes in Spanish and/or Portuguese language; responsible for maintaining consistency across the curriculum and supervising 40–50 sections per quarter.
His research explores Spanish language variation in the United States, investigating how social identities and cultural practices are developed and subsequently negotiated in linguistic interaction. As a Latinx Spanish/English bilingual speaker, Armando has a special interest in the ethnolinguistic repertoire of heritage language speakers who navigate landscapes influenced by unique ideological structures.