 He was a member of the New York State Senate from 1917 to 1923. He served the 20th District in the 140th and 141st New York State Legislature and represented the 18th District in the 142nd, 143rd, 144th, 145th and 146th New York State Legislatures. In March 1918, Cotillo opposed the proposed prohibition of alcohol in the state. Although he believed in temperance, he doubted if that would be achieved by prohibition; he advocated education and not infringing on civil liberties.
