 In 1929, Condon joined the scientific staff of the South Australian Museum; he was promoted to Assistant in Zoology in 1935, and became Curator of Birds and Reptiles in 1938.He kept this position for the decades through to 1976, broken only by a period of war service with the RAAF.Condon was Honorary Secretary of the South Australian Ornithological Association (SAOA) from 1938 to 1942, and was later editor of its journal, the "South Australian Ornithologist" from 1953 to 1964.