He served as the director of both the Dudley Observatory in Schenectady, New York and the Department of Meridian Astrometry of the Carnegie Institution of Washington.
[1] After attending The Albany Academy, he graduated from Harvard University in 1901 and worked at Dudley Observatory until 1905.
Naval Observatory at Samoa and helped organized the expedition to Flint Island to observe the 1908 solar eclipse.
[4] He joined the Department of Meridian Astrometry of the Carnegie Institution of Washington in 1908, working as a secretary until 1912 when he became acting director.
[6] His father served as editor of the Astronomical Journal from 1909 until his death 1912, whereupon Benjamin undertook the duty until 1941.