After completing his primary studies at the Nicanor Corral School, and his secondary studies at the Colégio Salesiano Orientalista de Cuenca, from 1977 to 1980, he frequented the institutional courses of Philosophy at the Instituto Superior Salesiano, at the time attached to the Pontificia Universidad Católica de Equador (now Salesian Polytechnic University), where he completed his degree in Educational Sciences, specializing in Psychopedagogy.
On April 15, 2008, Pope Benedict XVI appointed Becerra to assume the Apostolic Vicariate of Méndez, substituting to Pietro Gabrielli, SDB, who resigned due to reaching the canonical age limit, handing him over to the titular episcopal see of Celas in Mauritania.
His episcopal ordination took place on the following June 21, in the Cathedral of the Most Pure Virgin in Macas, by the then Apostolic Nuncio in Ecuador, Giacomo Guido Ottonello, with Gabrielli, or resigning bishop, and Luis Antonio Sánchez Armijos, bishop of Tulcán, both Salesians, as co-consecrators.
[1][2] Dom Néstor participated in the beatification ceremony of Irmã Maria Troncatti, FMA, held in the Cathedral of Macas, on November 24, 2012, presided over by Salesian cardinal Angelo Amato, Entente Prefect of the Congregation for the Cause of Saints, as papal delegate.
On the occasion, Dom Néstor read, in the name of the local Church, the Salesian request for the registration of Irmã Maria not cast two bem-venturados.