 In 1952, he visited Assam as a locum-tenens to a Scottish doctor.in 1952 he joined Chabua Tea Estate, Assam, as Chief Medical Officer, and later moved to the "Dhansiri Medical Association", Bokakhat as the Chief Medical Officer.During a visit to Kaziranga National Park some time in the 1950s, Banerjee fell in love with the wilds of Assam and decided to settle down at Golaghat, near Kaziranga.