Leila Guerriero graduated from the Colegio Nacional Normal Superior de Junín.

Her empirical start in journalism was in 1992 when she got her first job as editor at Página/30, a monthly magazine of the newspaper Página/12.

After sending a story entitled "Kilómetro cero" to the paper's reception desk, she received, four days later, a call from the then director Jorge Lanata.

[5] In 2010 she won the ninth edition of the Gabriel Garcia Márquez Journalism Award [es] from the Fundación Nuevo Periodismo Iberoamericano (FNPI) in the text category, for her chronicle "El rastro en los huesos", in which she recounts the work carried out by the Argentine Forensic Anthropology Team that identifies the remains of missing persons from the military dictatorship.

[6] In 2014 she received a Konex Award Diploma of Merit in the Chronicles and Testimonies category.