On [[January 14]], 1979, he was [[ordination|ordained]] [[deacon]] and assigned to the Cathedral of the Ascension of Our Lord (La Catedral de la Ascensión del Señor) in Mexico City. He was ordained a [[priest]] on [[March 1]], 1981. While continuing to serve at the [[cathedral]], he served the many missions throughout the State of Chiapas.
In 2001, he was elevated to the monastic rank of [[igumen]] by the [[Synod]] of Bishops. Two years later he was elevated to [[archimandrite]]. On [[May 28]], 2005, Archimandrite Alejo was [[consecration of a bishop|consecrated]] Bishop of Mexico City, auxiliary to Metropolitan [[Herman (Swaiko) of Washington and New York|Herman]], at [[St. Tikhon's Orthodox Monastery (South Canaan, Pennsylvania)|St. Tikhon's Monastery]] in South Canaan, Pennsylvania, following his election by the Synod of Bishops in March 2005. On [[October 16]], 2008, the Synod of Bishops of the OCA elected His Grace, Bishop Alejo as the ruling Bishop of Mexico City and the Exarchate of Mexico.
*[http://www.oca.org/news/1667 OCA News and Events item His Grace, Bishop Alejo elected ruling bishop of Exarchate of Mexico]
*[http://www.stgeorgepantry.org/bishopalejo.html Archimandrite Alejo consecrated Bishop of Mexico City]
*[http://www.oca.org/news/1761 Exarchate of Mexico elevated to full diocesan status]