In 1907 Pomeroy became master of the Art Workers Guild. He was elected an Associate member of the Royal Academy in 1906, and a full member in 1917. From 1898 to 1908 he was a regular exhibitor with the International Society of Sculptors, Painters and Gravers, at Leeds City Art Gallery from 1897 to 1909, with the Aberdeen Artists Society from 1893 to 1923 and with the Royal Scottish Academy he showed seven works between 1903 and 1924. Pomeroy displayed works at the Royal Academy Summer Exhibition each year from 1885 to 1924 and, in the same period, showed 17 works at the Royal Glasgow Institute of the Fine Arts and, late in his life, became a regular exhibitor with the Royal West of England Academy. Several museums hold examples of Pomeroy's work including the Tate, the Victoria and Albert Museum, the Ashmolean Museum in Oxford, the Laing Art Gallery in Newcastle upon Tyne and Pollok House in Glasgow.