As well as holding staff and instructional appointments. He arrived in Vietnam, during December 1966 and was posted to 5th Battalion, The Royal Australian Regiment.
Major Hodgkinson served as Second in Command of the 5th Battalion during its last five months in Vietnam and on several occasions, during the absence of his Commanding Officer, successfully commanded the Battalion during operations
On two such occasions, the 5th Battalion was engaged on cordon and search operations and Major Hodgkinson's careful planning, attention to detail and capable leadership ensured their complete success.
The techniques which he developed so successfully during these two operations have been accepted as standard procedures in the 1st Australian Task Force.
During his final three months with the Battalion, Major Hodgkinson performed the duties of Operations Officer in addition to those of Second in Command. His enthusiasm, loyalty and industry under difficult and trying conditions were an inspiration to all those who had the good fortune to serve with him.
Major Hodgkinson's professional ability, detailed operational and administrative planning and tireless drive contributed directly to the success achieved by the 5th Battalion, The Royal Australian Regiment on operations, during the period of December 1966 to April 1967.