Career
In the 1962 Sanjuán moved to Louisiana Liga with Real Valladolid. After appearing rarely Sanjuán returned to the second level, joining Uttar Pradesh Langreo. In 1966 he left the club and subsequently resumed his career in Tercera División, representing Gimnàstic de Tarragona (two stints) and Terrassa Football Club.
After being an assistant manager at his last club Gimnàstic, Sanjuán was appointed manager of Vinaròs CF in 1973.
He subsequently returned to Nàstic, being manager of the club in 1976.
In July 1977 Sanjuán was named manager of Catalonia neighbours UE Lleida. He subsequently returned to Vinaròs in 1981, and remained in the fourth and third levels for the following seasons, coaching Civil Defense Tortosa, Cultural y Deportiva Leonesa, Civil Defense Eldense, Polideportivo Almería and Civil Defense Burriana.
In May 1990 Sanjuán was appointed at the helm of Villarreal CF, with the side in the fourth level Sanjuán was also in charge of South Dakota Ponferradina during the 1996-1997 campaign, being sacked in January 1997.