Meghnath completed his graduation from St. Xavier's College, Kolkata in 1977 and was the organizer of the highest voluntary Blood Donor in 1977 and 1978.
In 1990, he did Film Appreciation Course from FTII, Pune and National Film Archive of India and also became a part of National Alliance of People's Movements (NAPM) and was part of Narmada Bachao Andolan along with Medha Patkar and participated in fasting for 22 days in the banks of Narmada.
He has also worked with reputed documentary filmmaker Tapan Bose and Suhasini Mulay in 1989-91 and he started discussion and debate on the pro-people development models in predominately Adivasi Area and was the founder member of Pani Chetna Manch along with members of People's Science Institute.
He worked on an alternative irrigation model and was part of making 125 small check dams (Ahar) and pines in Palamu district in 1993-95 under Sukha Mukti Abhiyan.
In the last 40 years of social and cultural work, he has had the opportunity to work and learn from many great people and to name a few they are Fr Gerard Beckers, Debabrata Roy, Mother Teresa, Pannalal Das Gupta, Bishop George Sopien, B. P. Keshri, Tapan Bose, Suhasini Mulay, Satish Bahadur, P. K. Nair, Baba Amte, Sunderlal Bahuguna, Medha Patkar and Ram Dayal Munda.