Sri Vijaya Puram, Nov. 24: The Chief Secretary of Andaman & Nicobar Administration, Shri Keshav Chandra, IAS has said that the Administration is working hard and sincerely for the overall development of Islands and for the welfare of the Islanders. Shri Keshav Chandra was speaking today (Sunday 24 November) at a Programme, organized by Chinmaya Mission to bid him farewell on his transfer to New Delhi.