He was earlier professor of South Asian Studies and Dean of School of International Studies, JNU after teaching at Patna University.
Prasad was a close associate of Jayaprakash Narayan and had authored a number of books on JP's philosophy and life including 'Socialism, Sarvodaya and Democracy', 'Gandhi, Nehru and JP, Studies in Leadership' and 'A Revolutionary's Quest'.
Among the other responsibilities he had held were Chairman, Institute of Gandhian Studies (Varanasi), Director, Gandhi Smriti and Memorial, Honorary Fellow, Nehru Memorial Museum and Library (NMML) and Honorary Director, Rajendra Prasad Academy in New Delhi.