Lance Corporal Jason Marks enlisted in the Australian Regular Army on the 2 March 1999.
After initial training, he was posted to the 4th Field Regiment as a Gunner until 2003, whereupon he transferred to the Royal Australian Army Medical Corps as a Medical Assistant.
In 2005, he undertook Special Forces Entry and Commando Selection, after which he transferred to the Royal Australian Infantry Corps and posted to the 4th Battalion (Commando), The Royal Australian Regiment.
Jason has seen operational service in East Timor and Afghanistan, where he has deployed to both theatres on more than one occasion.
Jason was killed during a gun-battle in Afghanistan on Sunday 27 April, 2008 when Australian soldiers were engaged by Taliban extremists using small arms fire and rocket-propelled grenades.