Donald Alastair Cameron, son of Dr John Cameron and grandson of Headmaster Donald Cameron, graduated BA (1921), MB (1927) and BS (1931) from the University of Sydney. He worked as a doctor in Ipswich and in 1940 transferred from the Militia, where he held the rank of captain, to the Australian Army Medical Corps, as Major. He served in the Middle East and in Papua during the Second World War, was mentioned in despatches and promoted Lieutenant-Colonel. He was appointed OBE in 1946. He won the federal seat of Oxley in 1949, and in 1956 became Minister for Health and from1960-61 was minister in charge of the Commonwealth Scientific and Research Industrial Organisation. He was defeated by Bill Hayden in the 1961 elections and in 1962 was appointed High Commissioner to New Zealand. He returned to Brisbane in 1965 and established a general medical practice. He was Chairman of Trustees of IGS, serving from 1948-56, following in the footsteps of his father, Dr John Cameron, who served on the Board for thirty years, including as Chairman from 1911-28.