He subsequently commanded both the 2nd Battalion, Royal Australian Regiment (2 RAR) and the 3rd Battalion, Royal Australian Regiment (3 RAR), and was the only officer to command all three of the original battalions of the Royal Australian Regiment.
He subsequently commanded the 3rd Battalion, Royal Australian Regiment (3 RAR) in 1963 serving as the commanding officer of the 2nd Battalion, Royal Australian Regiment (2 RAR) in 1963--1964. Consequently, Jackson was the only officer to command all three of the original battalions of the Royal Australian Regiment.