1. Juniour resident, All India Institute of Hygiene and Public Health Kolkata, India
2. Advisor Public Health(SAG) All India Institute of Hygiene and Public Health Kolkata, India
3. Associate ProfessorAll India Institute of Hygiene and Public Health Kolkata, India
4. Assistant Professor Assistant Professor
5. Professor and Head, All India Institute of Hygiene and Public Health Kolkata, India