He has published over 65 articles in national and international journals and has presented about 70 papers in various seminars/symposia including invited talks. He has research collaboration with CECRI(CSIR), Karaikudi, India, Department of Chemistry, IIT Roorke,India and Department of Biosensors,Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Poland. He is a fellow member of the Indian Chemical Society, Member, Managing committee, Indian Society for Electro Analytical Chemistry (ISEAC), Member, Governing Council, Inter University Centre for Nano Materials and Devices, CUSAT, Member, Advisory Committee, Centre for Science in Society,Kochi,Chairman, Board of Studies in Chemistry ,CUSAT and Member Advisory Committee, Inter University Centre of Instrumentation, Mahatma Gandhi University,Kottayam, India, Member,American Nano Society etc. He is a peer reviewer for many international journals such as Talanta, Bioresource Technology, Applied Organometallic Chemistry, Journal of Applied Polymer Science, International Journal of Environmental Analytical Chemistry, Journal of Solid State Electrochemistry, Sensor Letters, Drug Testing and Analysis, Monatshefte für Chemie, Indian Journal of Chemistry, Indian Journal of Chemical Technology etc. He has organized many national seminars as well as many scientific programmes. He has been associated with various sponsored research projects funded by different organizations like UGC, CSIR, DRDO, DST etc. Dr. Girish has supervised 11 PhD theses and 13 M.phil theses.