As a civil engineer he was one of the men, in leading position building the first subway-line beneath the Central Avenue, opened 1908. Later, he become for a short time chairman of the EAR, the Eight Avenue Railway. In 1913, Fiorino was elected as mayor of the city. In his term a lot of new subway-lines were opened and he was the man, who connected in the newspapers the common health, the social hand for cheap rides with the profit for the subway companies. But around 1920 the fare of 5 cent are too few money for the companies, to build more new lines. Therefore he changed his mind: The town shall take over the subways in own hand and may pay the missing money for the subway from the town-taxes.
After 1921 in opposition, he further follows this goal. Legendary are the disputes with Mayor John Hilhanny about the rising of the subway-fare in the 1930s. Hilhanny was named the "ten cent robber" for his agitation for a fare, allowing the companies to expand in new lines. Hilhannys announced the ticket for 4 rides each to 7,5 cent, if you use different companies and for Fiorino it was easy to tell long and broad about the handicaps of this bureaucratic solution.
In 1933, Fiorino again was elected as mayor. On the one hand was the stagnation of the subway net, the financial crisis of the subway companies, the expensive new subway-lines of the city owned SMS-lines 8, 9, 10 and 11 and on the other hand the inhabitants wish a cheap fare too then, if using different subway companies for a ride. The gordinic knot he slay through 1937, as he was elected new: The town takes over all subway lines, the fare rises to 10 cent and the missing money came from the town. The newspapers named him as the "father of a modern subway".
In 1941, Fiorino retired at the age of 69. He finished his life writing his memories and giving sarcastic interviews, as 1943 the fare rose to 15 cents and the standard of Stanton's subway network declined.
The old airport of Stanton is named after him.