Following his father's death several months after his graduation, he was employed by the U.S. Geological Survey, and in 1873 was sent to Kansas with a party surveying and subdividing the Kiowa-Comanche lands.
Following his father's death several months after his graduation, Doheny was employed by the U.S. Geological Survey. In 1873 he was sent to Kansas with a party to survey and subdivide the Kiowa-Comanche lands.