Thillai Sivakumar Natarajan has completed his PhD from CSIR-CSMCRI, Gujarat, India, in 2014 and then moved to South Korea and Taiwan for his Post-doctoral research and worked there until August 2016. In November 2016, he moved to Ireland and has been working as a Post-doctoral Researcher at School of Chemical and Bioprocess Engineering, University College Dublin, Ireland, under an Irish Research Council through Government of Ireland Post-doctoral Fellowship-2016 scheme. His research work mainly focuses on development of photocatalytic nanomaterials and surfaces and their use with different light sources (UV, solar and LED) in slurry and immobilized photocatalytic reactors for environmental remediation and energy applications. He has 20 research papers in internationally reputed journals and 4 book chapters. His publications have been cited over 800 times with the H-index of 12.