Julio César Robles began his classical guitar studies at the age of seven at the "Escuela de Iniciación Artística No. 3" of the National Institute of Fine Arts in his hometown Mexico City. He also trained in the Suzuki method, attending several academies organized by the Suzuki Institute, where he studied with Mary Lou Roberts and Zeah Riordan.

​In 2014, he entered the National Conservatory in Mexico City, studying with Juan Carlos Chacón until 2019, when he was admitted to the École Supérieure Musique et Danse Hauts-de-France in the class of Judicaël Perroy. He has since participated in masterclasses with renowned guitarists including Gabriel Bianco, Thibaut Garcia, Xavier Jara, Marcin Dylla, Raphaël Feuillâtre, Kristina Varlid, Luka Lovrekovic, Lovro Peretić, Rémi Jousselme, Michel Grizard, Mauro Zanatta, Lorenzo Micheli, Matteo Mela, Lynn McGrath, Louis Trépanier, Jonathan Leathwood, Omán Kaminsky, Goran Krivokapić, Jorge Caballero, and Leo Brouwer, among others. ​

Julio has won more than 20 national and international prizes, including First Prize at the GFA International Youth Competition in 2018, First Prize at the Drôme de Guitare competition in southern France in 2023 – after which he became a Savarez artist, Second Prize at the Roland Dyens Competition in Montrouge, France in 2024, and both Second Prize and the Audience Prize at the Groningen Guitar Competition in 2026.