With 15 years of experience, he has been associated with various prestigious hospitals and clinics. Dr. Rajkumar Kulasekaran currently works at Apollo Specialty Hospitals. Some of the places where Dr. Rajkumar Kulasekaran has worked in the past include Fortis Malar, Apollo. In addition to his affiliation with multiple hospitals, he has been professionally active in many other ways. He has been an active member of various organisations, including Indian Medical Association (IMA), Indian Chest Society. Dr. Rajkumar Kulasekaran is an alum of Sri Ramachandra University, Chennai where he earned a MBBS. Thereafter, Dr. Rajkumar Kulasekaran earned DNB - Respiratory Diseases from Apollo Hospitals and DNB from Respiratory Diseases - National Board of Examination, India.