From 1912 until 1914 he was professor of astronomy at the Agnes Scott College in Decatur, Georgia. He also served as a summer volunteer at the Yerkes Observatory. He returned to the University of Virginia in 1914 as an assistant professor, and was hired onto the McCormick Observatory staff to work on parallax measurements. In 1918 he left to serve in the world war.
Following the war he became director of the Flower Observatory at the University of Pennsylvania in 1928, resigning his position as a professor at Virginia. By 1945 he was Chairman of the University of Pennsylvania department of astronomy. During the 1940s he encouraged the university to sell off the land to pay for a new observatory. This was finally completed in 1956 and was named the Flower and Cook Observatory.
Bibliography
Charles P. Olivier, "Meteors", Baltimore, The Williams & Wilkins Co., 1925.
Charles P. Olivier, "Comets", Baltimore, The Williams & Wilkins Co., 1930.