Keller won more than 250 prizes in his career & both Presidents Hoover and Roosevelt were among his prestigious customers. He was a member of the Oregon Society of Artists. On December 9, 1929, the Society incorporated, with Clyde Leon Keller, as Vice President. The Society met at his art studio on SW Washington Street near 13th Avenue for many years. He later became the third president of the Society, and did much to see that the control of the Society was kept in the artists' hands. Keller exhibited at the Great Crystal Palace, NY; Meier & Frank, Portland; Oregon-California Artists & his paintings may be seen at the Elk's Club, Liberty Theater and Press Club, all in Portland, Oregon.