Dr Sircar is leading the Department of Pulmonology, Sleep Medicine and Critical Care at Fortis Hospital, Noida since July 2008. He has more than 36 years of experience behind him. He is teacher for both DNB Respiratory Medicine and Critical Care and Indian Diploma in Critical Care and a critical care examiner for National Board Examinations and Indian Society of Critical Care Medicine. He is actively involved in research and has numerous scientific publications to his credit. He is an expert at advanced bronchoscopic procedures and management of respiratory failure.