Cullan Jensen enlisted in the Army in 2012 as a cavalryman and posted to the 2nd/14th Light Horse Regiment (Queensland Mounted Infantry) in 2013 as an ASLAV Crewman Driver. Cullan was promoted to Corporal in 2018 and deployed on his first operational deployment in Training Team Charlie as a mentor on Task Group Taji – IX where he was responsible for mentoring Iraqi Senior Non-Commissioned Officer trainers at the School of Infantry Non-Commissioned Officers II.

Cullan was a co-author of Building Partner Capacity | A CPLs perspective from Task Group Taji IX.