On October 31, 1938, after returning from Spain, he was appointed Undersecretary for Internal Migrations, and in 1939 he became a member of the Chamber of Fasces and Corporations.

In the same year, he was appointed State Commissioner for Migration and Colonization and was involved in the recruitment campaign aimed at supplying Italian workers (Gastarbeitnehmer) to the German war industry.

In August 1942, he informed Foreign Minister Galeazzo Ciano that a serious shortage of workers was impending and that greater mobilization of the civilian population would be required for the functioning of the war industry.

This assignment proved to be short-lived, as Lombrassa resigned two months later following the fall of the Fascist regime and the establishment of the Badoglio government.

[4][5][6][7] After the Armistice of Cassibile, Lombrassa joined the Republican Fascist Party, but did not hold important posts within the Italian Social Republic.