Worked as Assistant Professor & Research Fellow, Nancy University (France) - till 1984 Assistant Surgeon, Kerala Government Service-till 1987 Chief, Pulmonology Department, Kovai Medical Center, Coimbatore- till 1992 Chief, Institute of Pulmonary Medicine and Research, Sri Ramakrishna Hospital, Coimbatore- till date Visiting consultant to various hospitals in Coimbatore. Visiting Professor, School of Medicine, West Virginia University, Morgan town, USA. Professor, Sri Ramakrishna Institute of Paramedical sciences, Coimbatore.

Clinical Respiratory Medicine/ Critical Care/ Interventional Bronchoscopy/ Pulmonary Pathophysiology / Sleep Disorders.