He was the principal of the Himalayan Mountaineering Institute (HMI), Darjeeling between 1981 and 1985.[1][7] He was chosen as the leader of the 1984 Everest expedition team composed of eleven men and six women, which summitted the peak in May 1984 through the South East Ridge route.[8] The team included Bachendri Pal, the first Indian woman to scale Mount Everest and Phu Dorjee, the first Indian to climb the peak without oxygen.[9]
Khullar is a member of the Expedition Commission of the International Mountaineering and Climbing Federation, Berne, Switzerland.[10] He is the author of several books on mountaineering and international politics[11] and has co-authored the second book written by Bachendri Pal in 2006 about the Trans-Himalayan all-women expedition of 1997. Khullar lives a retired life in Ambala in Haryana.[1]
^ ab"Padma Awards"(PDF). Ministry of Home Affairs, Government of India. 2015. Archived from the original(PDF) on 15 October 2015. Retrieved 18 June 2015.
^D K Khullar (1999). When generals failed : the chinese invasion : abdiction from battle, Tawang, Sela, and Bomdila, 1962. Manas Publications. p. 267. ISBN9788170490982. OCLC42719474.
^D K Khullar; B K Nehru (2000). Security, peace and honour. Manas Publications. p. 232. ISBN9788170490845. OCLC51591756.((cite book)): CS1 maint: multiple names: authors list (link)