Starting in 1925, he lived in New York, working for Ferrocarriles Nacionales de México.[3] Then, in 1927, he became a workshop assistant at Guillermo Ruiz Reyes' [es] Escuela de Escultura y Talla Directa.[2][5] He studied at Mexico City's Escuela Nacional de Bellas Artes from 1928 to 1930.[3] As a member of the so-called Mexican School of Sculpture, he participated in a rebirth of sculptural discourse in Mexico alongside Ruiz Reyes, Carlos Bracho, and others. He studied under Bracho and Luiz Ortiz Monasterio.[2] In 1930, he began working on large-format sculptures in collaboration with Ernesto Tamariz.[2] By 1932, he had gained recognition for his monument to Emiliano Zapata in Cuautla.[6][7]
In November 1933, a committee began considering proposals for Mexico City's Monumento a la Revolución, a major landmark commemorating the Mexican Revolution. Martínez Transformación was named one of the finalists alongside proposals by Federico Canessi and Fernando Leal. After creating life-size 11-meter models of his four proposed sculptures—La Independencia, Las Leyes de Reforma, Las Leyes Agrarias, and Las Leyes Obrera, Martínez won the competition and contributed the sculptures to the structure.[6]
In 1936, Martínez became interim director of the Escuela de Escultura y Talla Directa. Working in New York a decade earlier, he had contracted debilitating tuberculosis, and he died in Mexico City at the young age of 36.[3]