Lieutenant General John Graham Caligari, AO, DSC (born 21 August 1960) is a retired senior officer of the Australian Army.

In June 2000, he deployed as Commander of the 1st Battalion Ready Group on HMAS Manoora for the evacuation of Australians from the Solomon Islands (Operation Plumbob).

[2][3] Caligari oversaw numerous reforms while Chief of Staff, Headquarters Training Command – Army (TC-A) in 2005–06, under Major General Richard Wilson.

[4] In January 2009 he was appointed Deputy Commander, Joint Task Force 633 – Afghanistan, as part of Operation Slipper, a position he filled for six months.

[6] Promoted to lieutenant general in October 2014, Caligari was appointed Chief Capability Development Group (CCDG) in succession to Vice Admiral Peter Jones.