Upon completing his education in 1932, Levi Sandri entered a career as a civil servant in the Italian employment administration and was promoted to high-ranking posts at a young age. In 1940 he became a lecturer in industrial law at the University of Rome. In the same year, he served in North Africa in the Second World War. Following the armistice on 8 September 1943 and the related events, however, he chose to join the resistance movement against Benito Mussolini, where he came to lead the partisan formation "Fiamme Verdi" (Green Flames) in the Brescia region.
