Colonel Duncan George Roy was born in Southland in July 1973. He enlisted into the New Zealand Army in January 1992 and commenced officer training at the Officer Cadet School Waiouru. Colonel Roy graduated in December 1992 into the Royal New Zealand Infantry Regiment and was posted to 2nd/1st Battalion RNZIR Burnham Camp. During this period he deployed as a Platoon Commander with the United Nations Protection Force, Bosnia, from January to September 1995.
In December 2000 Colonel Roy commenced the Special Air Service Cycle Training. On the successful completion of this training in September 2001 he was posted to 1 NZSAS Regiment and held various appointments commensurate with being an officer of the Regiment. During this period he completed four SOF tours to Afghanistan, the last in the role of Senior National Officer.
In December 2011 Colonel Roy was posted to the role of Deputy Director Special Operations, Headquarters New Zealand Defence Force, Wellington. In June 2012 he assumed the role of Military Attaché, Washington DC, before returning to New Zealand in July 2015 as Commanding Officer 1 NZSAS Regt.
In 2017 Colonel Roy was promoted and posted to Wellington as Assistant Chief of Army (Strategy). In December 2019 he was posted to the role of Deputy Chief of Army followed by a role as the Special Operations Component Commander. In October 2022 Colonel Roy began his current posting as the Land Component Commander.
Colonel Roy is married to Nicki and has three amazing daughters.
Colonel Roy has a Masters of Strategic Studies with Merit from Victoria University. He was made a Member of the New Zealand Order of Merit in the New Years Honours list 2014.