Dr. SUDHIR KUMAR, Technical Advisor, Water Resources, APESI Pvt. Ltd. Worked various posts in different departments. He was Director (Retired), National Institute of Hydrology, Roorkee (Uttarakhand), INDIA. He completed his Ph.D. (Earth Sciences), M. Tech. (App. Geol.), Spl.: Geohydrology, Univ. of Roorkee, (Now IIT, Roorkee). He has more than 36 years of experience in Groundwater Flow Modelling, Groundwater Pollution and Vulnerability, Hydrogeological Investigations, Isotope Hydrology, Groundwater Dating, Surface Water – Groundwater Interaction, Groundwater Management, GIS Applications in Groundwater, Mining Hydrology, Spring Hydrology, etc. • Expert: Nominated by Supreme Court of India as “Expert Hydrogeologist to assist NDRF for protection of coal miners trapped in rat-hole mines in East Jaintia Hills District of Meghalaya”. (2019). He has been, Member: Monitoring Committee & Task Group to collect/ compile metadata of all springs in hilly states, Constituted by MoWR, RD & GR, Govt. of India (2019), Core Committee Member: Ministry of Earth Sciences sponsored project “Unravelling Submarine Groundwater Discharge (SGD) zones along the Indian subcontinent and its islands (Mission-SGD)”, National Centre for Earth Sciences Studies, Trivandrum. (2017-19).Chairperson: Committee constituted by MoWR for “Up Gradation of Chemical Laboratories of CGWB”. Prepared a special Report “Clean and safe drinking water – A step forward” report submitted to MoWR. (2016), IAEA Expert Mission on Utilization of Isotope Hydrology facilities for Groundwater Resources Management to Thailand Institute of Nuclear Technology (TINT), Ministry of Science and Technology (MoST), Bangkok, Thailand. (1-13 July 2013). IAEA Expert Mission on Artificial Recharge to Groundwater for Utilization and Control of Floods in Thailand to Department of Groundwater Resources, (Ministry of Natural Resources and Environment), Thailand. (8-13 July 2012). Expert: Invited by Government of Gujarat to “Investigate the cause of groundwater overflowing from wells in the coastal village of Olpad in Surat district, Gujarat”. June 2011. Member: Expert Team constituted by DST to “Investigate the emergence of water spring near village Domehar (Distt. Solan) and leakage of gas and heat through crevasses in village Ravana (Distt. Sirmur, H.P.). July 2006. Member: Expert committee constituted by Uttar Pradesh Government “To study the problem of salinity in groundwater in Agra and Mathura Districts”.