Note that his father was also Major General John WhitelawMajor General John Whitelaw, (11 June 1921 – 18 June 2010) was a career officer in the Australian Army who rose to the position of Deputy Chief of the General Staff (1977–78).
Joining the army in mid-1939, as a part-time soldier in the Royal Australian Artillery, Whitelaw was later commissioned and served in the Second Australian Imperial Force during the Second World War, seeing action in New Guinea and Bougainville.
After the war, he briefly returned to a career as a clerk, before taking up a Regular Army commission in the post war years, which saw him rise to the rank of major general.
In retirement he was active on many councils and committees.