Banerjee served in the Indian Army for 36 years from 1961 until his voluntary retirement in 1997. He was commissioned into the 2nd Battalion The 1st Gorkha Rifles and later commanded 5th Battalion The 1st Gorkha Rifles.
Several individuals named Banerjee have served with distinction in the Indian Army, including Major General Dipankar Banerjee, a 1961–1997 veteran, and Lt Gen Gautam Banerjee, a former Chief of Staff of Central Command. Other notable officers include decorated personnel from the 1st Gorkha Rifles and the Army Medical