Bartolo Perez was born in São Paulo (Brazil) on November 20, 1925.
He was a teacher and trainer at the University of Porto Alegre. Of Spanish origin, his parents, Francisco and Josefa, arrived in Brazil during the immigration period in the early 20th century.
At the age of 14, he began working as an apprentice turner in a small auto parts factory. It was in this factory, in 1942, that 16-year-old Bartolo Perez met young Emídio, a YCW activist who helped him look at reality: "I was very curious to know what dignity was, what it meant," Bartolo said in an interview a few years ago.
Thus, the young worker’s awareness was raised and he started carrying out militant actions with his comrades. One of the first actions was to go to the union to denounce the working situation of young people in the factory.
This is how Bartolo joined the YCW group in the Mooca neighborhood in the Sao Paulo region.