 He stayed in Thanjavur for 5 years and moved to Chennai in 1969 to join Stanley Medical College as a consultant surgeon and served the institution for 6 years till he moved to Madras Medical College in 1975 as the honorary professor of surgery and the head of the newly formed department of surgical gastroenterology.It was here, he helped start the first MCh course in gastroenterology in India as well as the first nursing diploma course in enterostomal therapy.Rangabashyam served as an examiner at several medical universities in India and abroad, including the Royal College of Surgeons of Edinburgh and was credited with efforts in introducing the FRCS examination of the Edinburgh Royal College in India.