Facundo Tello was born in Bahía Blanca, in the Buenos Aires Province on 4 May 1982.
[4] As he was settled in the first division, Tello officiated the first summer superclassic of 2018, with the Millionaires victory 1–0.
[5] That same year, he was summoned to officiate in the return final that defined the second promotion to the 2018-2019 Super League, between San Martín de Tucumán and Sarmiento with a 5–1 victory for San Martín de Tucumán.
[6] In 2019, Tello entered the roster of international referees for FIFA as he was appointed by Conmebol as a 4th official for the South American U-20 Championship in Chile along with his colleagues Fernando Rapallini, Ezequiel Brailosky and Gabriel Chade.,[7] becoming the first Bahia collegiate to achieve this distinction.
[9] On 6 November 2022, Tello refereed Argentina's Champions Trophy final between Boca Juniors and Racing Club, where he brandished ten red cards (seven red cards to Boca and three to Racing).