He was the last student to enter the school before it was discontinued. Pyle had noticed his decorative work in an exhibition at the Art Students League when he was lecturing there and invited him to join Percy Ivory, E. Roscoe Shrader, Harry Dunn, Remington Schuyler, Sidne Chase, and George DuBois as a student in Wilmington. Moore stayed in the 1305 N. Franklin Street studio until 1909 when he moved to “Naamans on Delaware.” He later went to New York where he worked with George Watson Barratt, a former Pyle student, doing stage designs for Shubert productions among others.
During his years as an illustrator, Moore worked for Harper’s Monthly, Woman’s Home Companion, and The Delineator. He was particularly well known for his religious subjects and painted an important series of them for the Ladies’ Home Journal.