- Director and Head of Dept, Pulmonology, C K Birla group of Hospitals, Kolkata.
- Director Research and Education, National Allergy Asthma Bronchitis Institute, Kolkata.
- Director, HERMES exams Asia (European Diploma in Respiratory Medicine)
- Director, Asia Pacific Alliance for Control of Influenza (APACI)
- Joint Secretary Indian Academy of Allergy (IAA)
- Founder Member South East Asian Academy of Sleep Medicine (SEAASM)
- 157 International and National publications in indexed journals and Abstracts along with 23 Book Chapters.
- Lead author for EMBARC India.
- Associate Editor for Respirology
- Associate Editor for Pneumonia and on the Editorial Board for numerus other journals.
- Dronocharya Award for Excellence in Continuing Medical Education in India (IHW),
- Indira Gandhi Gold Medal for Outstanding Individual achievement in Medicine (GEPRA)
- Coordinator for DNB course for the last 8 year. Started first DNB Respiratory course in Bengal