How do Australian army officers progress through ranks and how long in each one?

Australian Army officers typically progress through ranks based on a combination of time in service, performance, and completion of required training courses. The usual progression starts from Second Lieutenant, moving to Lieutenant, Captain, and then Major, with time in each rank generally ranging from 12 to 18 months for the lower ranks, and longer for higher ranks. Advancement to senior ranks, such as Lieutenant Colonel and Colonel, often requires additional leadership roles and professional development, extending the time spent in each rank significantly. Ultimately, career progression can vary based on individual merit, operational needs, and opportunities within the Army.