Flight Lieutenant Subir Kumar Niyogi was commissioned in the Aeronautical Engineering (Mechanical) Branch of the Indian Air Force In October, 1963.

During the December, 1971 operations he was posted as the Engineering officer of Fighter Bomber Squadron which was operating from a forward airfield in the Western Sector.

Throughout the hostilities, with his skill and hard work, he maintained a high rate of aircraft serviceability despite the fact that on many occasions, the aircraft came back badly damaged by enemy fire. Again with his ingenuity he got the damaged fuel tanks vulcanized through local civil sources and patched up bullet holes on the aircraft with improvised means when the specialist for patch repairs was not available and thus made the aircraft operational within hours.

On 9th December, 1971, when one aircraft was badly damaged at 1600 hours by antiaircraft guns with the rear fuselage ripped open at three places and the engine also damaged he, along with his crew worked overnight and made the aircraft serviceable for flying by next morning.

Flight Lieutenant, Subir Kumar Niyogi displayed high initiative, ingenuity, devotion to duty and professional in the best traditions of the Indian Air Force. For his distinguished service of a high order, he is awarded the Vishisht Seva Medal.