Walter A. Sinz was an American sculptor born in Cleveland, Ohio on July 13, 1881. Sinz’s father was a lithography instructor at the Cleveland School of Art who taught Since printmaking as a young boy. Sinz began studying sculpture in 1907 at the Cleveland School of Art under Herman Matzen.

Sinz taught lithograph and sculpture at the Cleveland School of Art from 1911 to 1952. He continued to sculpt on commission after his retirement. Since worked in a variety of media, including metal, stone, wood, and ceramic, even designing figures for Cowan Pottery from 1928 to 1931

Sinz exhibited in the annual May shows held at the Cleveland Museum of art from 1919 to 1966.

Sinz died in 1966.