[2] He held several staff and instructional appointments, including that of Director General Combat Vehicles dealing with the Arjun tank.

[3][4] He was awarded the Param Vishisht Seva Medal for distinguished service to the Indian Army and the nation.

[5] He retired from the Indian Army on 30 September 1997, after 40 years of military service.

[4][6] After retirement from the Army, General Roychowdhury became a member of the Rajya Sabha, where he highlighted defence related issues.

[3] Since 21 January 2008, he has been a Director of Indian Metal & Ferro Alloys Ltd.[2][4] His autobiography titled Officially at Peace was published by Penguin Books in 2002.