Martínez was born in Santiago de los Caballeros, Dominican Republic and raised in New York City, United States. She attended Bronx Bridges High School where was the captain of the school's softball team. After high school she attended the City College of New York, University of New York where she graduated summa cum laude a bachelor's degree in psychology and Latin American studies.[citation needed]
Martínez won Miss Dominican Republic 2021 on November 7, 2021, at the Salón de Eventos Sambil in Santo Domingo de Guzman. She was crowned by the former winner Kimberly Jiménez.[3]
Having tested positive for COVID-19, Martínez was replaced by first runner-up Debbie Aflalo for Miss Universe 2021. She was later designated as Miss Dominican Republic 2022 and competed at Miss Universe 2022,[4] where she was the second runner up.[5]