Lieutenant General Jai Singh Nain PVSM, AVSM, SM, ADC is a former General Officer-Commanding-in-Chief (GOC-in-C) Southern Command of the Indian Army.

He assumed the post from Lieutenant-General Chandi Prasad Mohanty.

[1] Nain has served as a United Nations military observer with the UN mission in Iraq and Kuwait.

[1] He is the alumnus of Sainik School Kunjpura, Karnal Haryana.

and belongs to 62nd course Hunter Squadron of National Defence Academy Khadakwasla Pune