In the succeeding fifth and sixth De Gasperi governments he served as one of the undersecretaries to the Treasury Minister from 1948 to 1951.

In the succeeding De Gasperi WAYS government from 1951 to 1953 he served as Minister for Transport.

In the succeeding Giuseppe Pella government from 1953 to 1954, he served as Minister for Industry and Commerce.

In January 1958 he became one of Italy's first European Commissioners as a vice-president of the Hallstein Commission with responsibility for the Internal Market.

However, in September 1959 he resigned from the commission as he was elected President of the European Coal and Steel Community, a position he held until November 1963.