Professor Milagros Alfonso Vega has a degree in Philology (with a specialization in Linguistics) from the University of Havana and a Ph.D. in Linguistics from El Colegio de México.

From 1996 to 2000, she was a researcher at the Instituto de Investigaciones Filológicas of the Universidad Nacional Autónoma de México and taught several courses on Spanish grammar at the Facultad de Artes y Letras of that University. In 1998 she received the Wigberto Jiménez Moreno prize for the best doctoral thesis in Linguistics, awarded by the National Institute of Anthropology and History, and in 2001 the National University Distinction for Young Academics (Research in the Humanities).

She has been Professor and Researcher at the Universidad Autónoma Metropolitana (UAM) Iztapalapa Campus since 2000. She regularly teaches courses in Historical Linguistics I, Historical Linguistics II, and History of Linguistics, as well as other curricular and elective subjects in the Bachelor's Degree in Linguistics, and also teaches courses and directs theses in the Master's and Doctoral Program in Humanities, Linguistics Line, of this institution.

Her research focuses on the syntax of Spanish in both synchronic and diachronic perspectives. She is the author of the book Causative constructions with the infinitive in medieval Spanish. Structure and evolution, as well as articles and book chapters devoted to the syntactic behavior of this language and the history of its evolution.