Master of Science, Banaras Hindu University, India, 1970. Doctor of Philosophy, Banaras Hindu University, India, 1976.
Scientist Council for Science & Industrial Research, Sillong, India, 1977-1978. Lecturer North-Eastern Hill University, India, 1978-1986. Postdoctoral fellow International Rice Research Institute, Los Banos, Philippines, 1984-1986.
Research associate Virginia Commonwealth University, Richmond, 1986-1988. Postdoctoral associate University Florida, Gainesville, 1988-1990. Postdoctoral fellow Auburn (Alabama) University, since 1990.
Member school board North-Eastern Hill University, 1984-1986, member board graduate studies, 1984-1986.
Member American Association for the Advancement of Science, International Society Plant Molecular Biologists, American Botanical Society.