General John Stuart Baker was a senior Australian Army officer. Entering the Royal Military College, Duntroon in 1954, his career culminated with his appointment as Chief of the Defence Force from 1995 to 1998, the most senior position in the Australian Defence Force. Baker also served as the inaugural Director of the Defence Intelligence Organisation from 1990 to 1992, Vice Chief of the Defence Force from 1992 to 1995, and was author of the highly influential 1988 "Baker Report".

The Chief of the Defence Force (CDF) is the highest-ranking and most senior military officer in the Australian Defence Force (ADF) and is the principal military advisor to the National Security Committee and the Minister for Defence. The current Chief of the Defence Force is General Angus Campbell, who took office on 6 July 2018.