Pesqueira was born in Arizpe, Sonora. His older brother, Ignacio, went on to serve as Governor of Sonora.[2]: 72 Roberto joined Francisco I. Madero's Anti-Reelectionist Party in 1910 and was elected federal deputy representing the first district of Sonora in 1913,[1] but refused to serve in the Chamber of Deputies after the consummation of Victoriano Huerta's coup d'état on 20 February 1913, and decided to join the revolutionary forces instead.[2]: 58
He was elected federal deputy once again in 1917 and acquired oil fields some years later. In February 1923 he wrote a letter to President Álvaro Obregón, alerting him of some irregularities detected in his foreign competitors; in particular, the Huasteca Oil Company.[4]
^Barragán Rodríguez, Juan (1946). Historia del ejército y de la revolución constitucionalista (in Spanish). Vol. 1. Mexico City: Antigua Librería Robredo. pp. 135–140.