Chairman, Water Sector, Global Technology Watch Group (GTWG), TIFAC - DST (Mar. 2017 - date).
Chairman, Technical Committee to develop "World Class Protocol for Reassessment of Water Resources Potential of India", Ministry of Water Resources, Gov. of India (Oct. 2016 - Jan. 2017).
Chairman, Review Committee, Peer Review of Department of Hydrology, IIT Roorkee (Mar. 01, 2014).
Chairman, Water Resources Management Committee, International Association for Hydro-Environment Engineering and Research (IAHR) (2008-2015), Secretary (2007-2008).
Chairman, Review Committee, Benchmarking of National Institute of Hydrology (NIH), Ministry of Water Resources, Gov. of India (2013).
Co-chair (India), Indo-Dutch Advisory Committee, DST-NWO Call on Urban Water Systems (Oct. - Nov. 2018).
Panel Member, International Meeting on "Climate and Water" to discuss research outputs from Asian counties and future research directions in the area of Climate Impacts on Hydrology and Water Resources, Disaster Prevention Research Institute, Kyoto University, Japan March 7-10, 2004.
Expert Member, Review Committee for the UN-Sponsored project on Vulnerability Assessment of Freshwater Resources in South and Southeast Asia, Asian Institute of Technology, Bangkok, Thailand, September 2007.
Faculty Mentor, Dept. of Civil Engineering, NIT Silchar (2009).
Panel Member, International Conference on "Web and Open Access to Learning", organized to debate the issue related to Open Access to Learning: Challenges & Perspectives. Dubai, UAE, November 25-27, 2014.
Session Member, Access to Scientific Knowledge (A2SK): Lessons learned and the way forward for SDG2030, World Summit on the Information Society (WSIS) Forum 2016, International Telecommunication Union (ITU), Geneva, Switzerland, May 5, 2016.
Review Committee, Peer Review of Department of Civil Engg., IIT Madras (Nov. 26-27, 2013).
Review Committee, Peer Review of Department of Civil Engg., IIT Bombay (Jan. 13, 2014).
Peer Review Committee, Interdisciplinary Programme on Environmental Engineering and Management, IIT Kanpur (May 2015)
Peer Review Committee, National Institute of Technology, Meghalaya, Shillong (May 2015)
National Institute of Hydrology (NIH) Society, Ministry of Water Resources, Gov. of India (Jul. 2013-Jun. 2016).
Management Committee, Specialist Group on Climate Change and Adaptation, International Water Association (IWA), UK (2006-2010).
Scientific Committee, SWITCH (Sustainable Water-management Improves Tomorrows Cities Health) project of the UNSECO, IHE-Delft, Netherlands (2006-2011).
Task Force on Water, Scientific Advisory Council to the Prime Minister, Govt. of India (Dec. 2013 - Apr.2014).
Steering Committee, National Water Mission, Govt. of India (Sep. 2011- date).
Research Advisory Committee (RAC), Indian Institute of Tropical Meteorology (2012 - 2017).
Indian National Committee on Climate Change (INCCC), Ministry of Water Resources, Govt. of India (July 2012 - date).
Programs Advisory Committee, Water Technology Initiative, DST, Govt. of India (2012 - 2014).
Project Appraisal and Monitoring Committee (PAMC), Hydrology and Cryosphere, Ministry of Earth Sciences (June 2012 - date).
Program Advisory Committee (PAC), Civil and Environmental Engineering, Science and Engineering Research Board (SERB), DST (June 2012 - date).
Expert Committee, DST-FIST (June 2016 - date).
Achievements Review Committee, NIH Roorkee (Sep. 2017 - Feb. 2018)
External Expert Committee, Faculty Excellence Award, IIT Kharagpur (Aug. 2018)
Project Management Committee, to Review and Monitor "Himalayan Cryospheric Observations and Modelling (HiCOM)" Project, Ministry of Earth Sciences (2017 - 2020)
Performance Review of Central Water and Power Research Station (CWPRS), Pune (April 2009).
Steering Committee on Urban Flooding, National Disaster Mitigation Authority (NDMA), Govt. of India (2007-2011).
Expert Committee, Storm Water Drainage, Ministry of Urban Development, Government of India (2008-2011).
Environmental Clearance Committee, Govt. of Karnataka (2000-2001).
IITs-IISc Core Committee to advise the Task Force on Interlinking of Rivers, Government of India (2003 - 2005).
State Government Committee for Integrated Water Resource Development, Government of Karnataka (2003).
Working Group on Integrated Reservoir Operations, Narmada Control Authority (NCA), Government of India, Indore (2001-2002).
Project Advisory and Management Committee (PAMC), WAR for Water: Sea Water Intrusion and Sea Water Farming, Scheme of DST (Sep. 2010 - Apr. 2012).
UNESCO team, to carry out a rapid assessment of the Kosi river floods on the Nepal side (Feb 2009).
Academic Advisory Committee for School of Infrastructure, IIT Bhubaneswar (2009 -2010).