Management

Chairman, Indian Water Works Association (IWWA) and Ex Director,Professor & Head, Department of Sanitary Engineering, AIIH&PH, Kolkata and Guest Professor, School of Water Resources Engg., Jadavpur University

GP Advisor, RKG group and Former Advisor, Dept. of Science & Technology, Government of India

Former Head, International Cooperation & Scientist 'G' Dept. of Science & Technology, Government of India

Retired Senior Scientist, Drdo Flat No. 1107, Block 17, Heritage City, Mg Road, Gurugram

Head, Department of Geography, North Eastern Hill University, Shillong & Vice President, International Association of Geomorphologists

Scientific Officer - F, Co-Investigator, International Cancer Genome Consortium ACTREC, Mumbai, Maharashtra

Self Employed Mnav 44, Aparajita, Near Devi Choudhurani Kali Bari Bengal Ambuja, Durgapur, West Bengal

Former Director Professor & Hod Department Of Bio Chemistry Faculty Of Medical Sciences University Of Delhi

Social Worker P-778a, Lake Town, Block – A, Kolkata – 700 089

Business 1, Acharya Jagadish Chandra Bose Road, Paschim Barisha, South 24- Parganas, Kolkata – M700 063

Service 59/1/2, Raja Rammohan Sarani Kolkata – 700 009

Scientist 'F', SSPL (DRDO), Delhi

DBT Project Associate & Associate Editor, IJEHS

Former Associate Fellow & Principal Indian PhD supervisor at Teri-Deakin Nanobiotechnology Centre, New Delhi .
Former Honorary Fellow, IFM, Deakin University, Australia