President Elect, Indian Society of Gastroenterology, Tamilnadu Chapter, 2011-2012., President Elect, Society of Gastrointestinal Endoscopy of India, 2006-2007, Vice President, Society of Gastrointestinal Endoscopy of India , 2005-2006, Chairman & Chief Interventional Gastroenterologist from MedIndia Hospitals MedIndia Institute of Medical Specialties,(MIMS), Chennai, TamilNadu, South India, (October 2001 onwards till date), Chief Interventional Gastroenterologist from MedIndia Hospitals MedIndia Institute of Medical Specialties,(MIMS) Coimbatore & Chennai, TamilNadu, South India, (1997 to till date), Organised a new Department In-charge & Chief Gastroenterologist from Department of Medical Gastroenterology, Coimbatore Medical College & Hospital, Coimbatore, TamilNadu, South India,(7th April 1989 to 31st July 1997), Assistant Professor from Department of Medical Gastroenterology, Madras Medical College, Madras, TamilNadu, South India, (13th October 1986 to 31st March 1989), Senior Resident, Department of Gastroenterology from Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India, (23rd January 1984 to 23rd January 1986), Junior Resident, Department of Medicine from Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India(1st January 1982 to 31st December 1983), House Job & Research Fellow from Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India, )14th July 1980 to 31st December 1981), Compulsory Rotary Residential Internship (CRRI) from Govt. Rajaji Hospital Madurai Medical College, Madurai, TamilNadu, South India(23rd January 1979 to 23rd January 1980), VISITING PROFESSOR, Adjunct Professor, The Tamil Nadu Dr. M.G.R. Medical University, Chennai since December, 2010, Visiting Professor at Raja Muthiah Medical College, Annamalai University, Chidambaram, TamilNadu, Visiting Professor, Arupadai Veedu Medical College, Pondicherry, India, Advisory Panel Member, Scientific Committee for G.K.N.M. Hospital, Coimbatore and Sri Ramakrishna Hospital, Coimbatore (Tertiary care centres offering Dip NB program), Visiting Consultant Gastroenterologist, Southern Railway Hospital, Perambur, Chennai, 2004-2005