Bruno was born in Castello di Lecco in 1913. After moving to Sesto, he was employed at Breda from 1930 to 1934. He married, and after his time at Breda, he was hired as a driver-mechanic by Autotrasporti Teruzzi. He was arrested during the raids that followed the great strike of March 1944: on the night of March 12, he was taken away by men in civilian clothes and imprisoned at San Vittore. His wife, who had a 2-year-old daughter and was expecting their second child, was unable to receive any further news of him.

Bruno was immediately included in the Streikertransport (strikers' transport) compiled in the German wing of the prison. Sent to the Umberto I barracks in Bergamo, he awaited the formation of the convoy that departed for Germany on March 17. This was the third convoy transporting those who had joined the strike that had halted production across all factories in Northern Italy. Between March and June, the number of strikers and anti-Fascist organizers arrested in response to the largest general mobilization in Nazi-occupied Europe exceeded 3,000 deportees.

Bruno arrived at Mauthausen on March 20 and was registered as Schutzhaft, Red Triangle, with the number 59115—the classification for those arrested for security reasons under indefinite detention. He was first sent to Gusen, then—selected by the camp organization for his technical skills—to Schwechat near the Vienna airport, where he worked in aircraft production. After the airport was bombed, the production and the prisoners were transferred to Neustadt. Bruno worked there for only a few months: he died on September 14 at the age of only 31 from pneumonia and heart failure. His second son had been born just one month earlier.