Ensko registered for the draft on June 5, 1918 but he did not serve. At the time he was working as an antique dealer at 598 Madison Avenue. He lived in Freeport, New York on Long Island. In 1930 Ensko was living at 40-20 205th Street, Bayside, in Queens, and had a servant living in the household. Robert Ensko, Inc. silver was being advertised in The Antiquarian Magazine in March and April 1930. At the death of his father in 1934, Ensko took over Robert Ensko, Inc. which had its showroom at 682 Lexington Avenue in Manhattan. He continued to commission the creation of reproductions of antique silver, to be sold under the Ensko name.