Derrill de Heer served in the Citizens Military Forces (CMF) (2 Commando Company) and Australian regular army from 1961 to 1983. He served in Malaya and two tours in South Vietnam. First tour with 8 Battalion The Royal Australian Regiment and as an original member of 1st Australian Psychological Operations Unit. Second tour in 4 Battalion The Royal Australian Regiment / New Zealand (ANZAC). He trained and instructed in Special Operations at 1 Commando Company and the Royal Australian Navy Mine Warefare and Clearance Divers School at HMAS Penguin.
On leaving the military in 1983 he attended the University of Canberra where he gained a Bachelor of Arts in Administration, a Diploma in Teaching and a Bachelor of Arts in Adult Education.
Mr de Heer has worked in Teaching, Training, Human Resource Management, Quality Assurrance, Business Development, Security, Facility Management, Financial Planning and the Australian Taxation Office GST Implementation. He also conducted his own business in private investigations, commercial agent and security consulting.
Mr de Heer has a Master of Arts in History at the University of New South Wales.
Derrill is currently a Research Associate in a research team lead by Dr Bob Hall. This project is titled Understanding Low-Intensity Conflict.
The Australian armys role and performance in Vietnam and Confrontation. The Vietnam War. Confrontation. Combat effectiveness.
- Instructor Australia Yachting Federation
- Certified Coach Australian Coaching Council Yachting
- The Australian army's role and performance in Vietnam and the Indonesian Confrontation.
- Oral history interviews Navy Clearance Divers for Australian War Memorial.
- Psychological Operations and the Media in conflicts.
- The Australian army's role and performance in Vietnam and Confrontation.
- The Vietnam War.
- Combat effectiveness.
- Iraq conflict
- Afghanistan conflict
- Falklands War
Mr de Heer is the unit historian for 2 Commando Regiment and is working on their unit history for the period 1996 to 2010.
Derrill De Heer, Dr Bob Hall, Dr Andrew Ross & Dr Amy Griffin Operation wandering souls : the journey home : the Phuoc Tuy documents Volume 1 = Nhung linh hon phieu bat: Troi lai que huong : Nhung la thu Binh Dinh [ Book : 2013 ].
Dr Bob Hall, Mr Derrill de Heer. Operation wandering souls : the journey home : the Phuoc Tuy documents Volume 2 = Nhung linh hon phieu bat: Troi lai que huong : Nhung la thu Binh Dinh.
Derrill De Heer, Dr Bob Hall, Dr Andrew Ross & Dr Amy Griffin. Operation wandering souls : the journey home : the Binh Dinh letters = Nhung linh hon phieu bat: Troi lai que huong : Tai lieu Phuoc Tuy. [ Book : 2013 ]
MA Research (Military History) thesis Victoria per mentum: Psychological Operations Conducted by the Australian Army in Phuoc Tuy Province South Vietnam 1965- 1971.
Easter Offensive 1972.
Journal articles and book contributions
Ekins, Ashley with McNeill, Ian. "Fighting to the Finish: The Australian Army and the Vietnam War, 1968-1975", Allen & Unwin, Crows Nest, NSW, 2065. 2012. Quoted Thesis "Victory Through the Mind: Psychological Operations Conducted by Australian Army in Phuoc Tuy Province South Vietnam 1965-1966". Pages 138 - 142.
Research Report for Defence Science and Technology Organisation
Dr Bob Hall, Dr Andrew Ross, Dr Amy Griffin and Mr Derrill de Heer. Mine Warfare: 1 ATF in Vietnam. DSTO Report.
Dr Bob Hall, Dr Andrew Ross, Mr Derrill de Heer, "Comparative Study: Combat Operations in North Borneo (Indonesian Confrontation) and 1 ATF in Vietnam". DSTO Agreement 290725, Final Report 18 October 2012.
Conference presentations and proceedings
Dr Bob Hall, Dr Andrew Ross, Dr Amy Griffin, Dr Spike Barlow and Mr Derrill de Heer, "A new operational analysis of the 1st Australian Task Force in Vietnam, 1966-1971", Texas Tech University Vietnam Centre and Archive, Seventh Triennial Vietnam Symposium, Lubbock, Texas, 10-12 March 2011.
Dr Bob Hall, Dr Andrew Ross, Dr Amy Griffin, Dr Spike Barlow and Mr Derrill de Heer, "Remembering the war dead of the Vietnamese Liberation Forces: The "Operation Wandering Souls" Project", Association for Asian Studies & International Convention of Asia Scholars, Honolulu, Hawaii, 31 March " 3 April 2011.