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.

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.