[1] Tello was born in 1971 and received his undergraduate degree in Public Accounting from the Universidad Autónoma de Zacatecas.

[1] After graduation, Tello worked in the private sector; he served as an auditor to CONALEP,[clarification needed] and from 1994 to 2000, he directed Bancomer's banking operations in the Zacatecas towns of Ojocaliente, Calera and Jerez.

[1] In 2005, he became the manager of institutional relations for Grupo Modelo in Zacatecas; the same year, he became an active member of the PRI.

[1] In January 2016, Tello departed the Senate in order to seek election as governor of Zacatecas; he was replaced by his alternate, José Marco Antonio Olvera Acevedo.

On February 7, the PRI named him candidate under the banner Primero Zacatecas, an alliance that also included the PVEM and Nueva Alianza.