- From August 2005 to Sept. 25, 2006. Worked as a research student in Plant pathology laboratory in Department of Botany, University of Lucknow, Lucknow.
- From Jan. 15 to May 7, 2007. Worked as research student in Dendrochronology laboratory in Birbal Sahni Institute of Palaeobotany, Lucknow.
- From Jul. 23, 2007 to Jan. 2011. Worked as Ph. D. student in Cenozoic laboratory (megafossil) in Birbal Sahni Institute of Palaeobotany, Lucknow.