Bachelor of Science, Calcutta University, 1987. Master of Science, Calcutta University, 1990. Master of Philosophy, North Eastern Hill University, Shillong, India, 1993.
Doctor of Philosophy, North Eastern Hill University, Shillong, India, 1997.
Junior research fellow North Eastern Hill University, 1991-1993, senior research fellow, 1993-1995. Resource person Madurai (India) Kamaraj University, 1995-1996. Research associate Jawaharlal Nehru Center for Advanced Science Research, Bangalore, India, 1996-1998, fellow India, 1998-1999, faculty fellow, since 1999.
Guest researcher Norges teknisk-naturvitenskapelige universitet, Norway.
General secretary Gyan Bhaskar Pustakalaya, Titagarh, India, 1984-1991. President Research Scholars Welfare Association, Shillong, 1992-1994. Member Indian Society Complex Systems (life), Indian Academy of Sciences (associate).