An IITB alumnus, he has an education background in Environmental Engineering. Prior to joining IITB as faculty, Prof. Kalbar worked for two-years as postdoctoral researcher at the Division for Quantitative Sustainability Assessment, Dept. of Management Engineering, Technical University of Denmark (DTU). His research interests lie in the cross-cutting issues of water supply, sanitation, circular economy, sustainable urban development and urban planning, and includes applying environmental sustainability assessment tools (Life Cycle Assessment, Material Flow Analysis, Multiple Criteria Decision Making, etc.) to urban systems, cities, buildings, infrastructures, lifestyles and technologies. He has wide industrial and consulting experience in water sector, urban waste management and environmental sustainability.