Greaves was appointed Chief Assistant at the Royal Observatory, Greenwich, in 1924. He held this position until 1938 when he was appointed to the chair of astronomy at the University of Edinburgh and Astronomer Royal for Scotland. He was Professor of Astronomy at Edinburgh from 1938 until his death in 1955. While at Greenwich, Greaves had married Caroline Grace Kitto in 1926; their only son George Greaves became a mathematician.
He was elected a Fellow of the Royal Astronomical Society in 1921 and served as its President from 1947 to 1949. He was elected a Fellow of the Royal Society of Edinburgh on 6 March 1939 having been proposed by James P Kendall, Max Born, Edmund G Dymond, Ruric W Wrigley, Edwin A Baker, and Sir E T Whittaker. He was Secretary to Ordinary Meetings of the Society 1940-5, and Vice-President 1946-9. Greaves was also elected a Fellow of the Royal Society in 1943.
Article by: J J O'Connor and E F Robertson