During his tenure with the 7th and 9th Maratha LI and also while on higher command and staff appointments, General Singh has served in Jammu & Kashmir, Nagaland, Arunachal Pradesh, Sikkim, and Joshimath in Uttranchal. He was awarded the Vishisht Seva Medal during his command tenure with the 9 Maratha Light Infantry in Arunachal Pradesh. He later commanded the 5th Maratha LI at Hyderabad in the rank of Colonel. A consistent front-runner, he was the youngest and one of the first in his batch to attend Staff College, Senior Command, Higher Command and National Defence College courses. He has contributed articles to regimental and other professional journals and his thesis on "Sino-Indian Border Dispute" and "Strategy to Boost Defence Exports" have been highly acclaimed. He has the honour of being India's first Defence attaché to Algeria (1987–1990).