Shaswat Kumar Das is the Director (R&D) and CEO of Green Tech Concrete and Research, Bhubaneswar, India. He has been involved with several national and international organizations for R&D works in Alkali Activated Materials (AAMs), geopolymers and sustainable cementing materials and published several peer reviewed journal articles. He is a recipient of the Student Project Grant Award by ASTM International (2018-19). He is the member of several international societies and associations, including the American Society of Civil Engineers (ASCE) and ASTM International.