Lt Col Harjinder Singh was born on April 17, 1978. He studied a prestigious course at National Defence College in New Delhi and was an active writer. He wrote mostly on the makers of the military. His most recent work is titled, ‘China center space capabilities’.
He belonged to 11 Gorkha Rifles, the same regiment as Rawat, and had been deployed in several battalions including the Siachen Glacier. Lt Col Harjinder Singh, who is originally from Lucknow served as Staff Officer to the CDS. According to reports, Lt Col Singh had also served a tenure in the United Nations Peacekeeping Mission. Part of 2/11 Gorkha Rifles, Singh was commissioned in September 2001 from Officers Training Academy, Chennai. He also served in North East along LAC, LC in J&K Served in Sikkim Scouts Staff Officer in a Corps HQ. Lt Col Singh also served as an instructor at IMA and Served in the High Altitude Area.