- 36 years of extensive professional and academic experience in the field of Civil and Environmental Engineering.- Has acquired valuable experience in working with more than 30 National and International Consultancy Organizations in 60 prestigious National and International projects and held key positions. Many of these projects were funded by various International Funding Agencies such as ADB, WB, DFID, JICA, KFW, UNICEF, GTZ, AUSAID and USAID.- During the tenure of professional services was involved in a number of Infrastructure Projects in India, Bhutan, Rwanda, Kuwait, Mongolia, Afghanistan and Bangladesh mainly related to Rural and Urban Water Supply, Water Conservation and Treatment, Sewerage, Sewage Treatment and Sanitation, Urban Drainage, Solid Waste Management and Building Projects.- Worked in the capacity of Individual Consultant for the ADB and UNICEF.- Apart from the professional engagements, was also associated with the premier institute, the Indian School of Mines, Dhanbad, India, as Adjunct Professor in the Environmental Science and Engineering Department of the Institute during the period from 2011 to 2013.