Naik Nirbhay Singh Sisodiya, AC (1 May 1958 – 6 June 1984) was an Indian military Non Commissioned Officer (NCO) with the 15th Battalion of the Kumaon Regiment.

During the Operation Blue Star on 6 June 1984, he provided cover for his company commander from heavy firing by the Sikh militants using medium machine guns.

Although he suffered bullet shots to his legs, he crawled to reach the pot hole and lobbed a grenade into the basement, but exposed himself to heavy firing and succumbed to his injuries.

He was a keen sportsman and his early education took place in Jhalawar where he passed his IX class from Government Higher Secondary School.

During the operation, Singh's company was given the task to clear an important building complex which was heavily fortified and strongly held by fierce terrorists.

Naik Nirbhay Singh set to provide cover to his company commander, plunged forward and mounted a light machine gun.