Mr. Sen is an Indian Administrative Service (IAS) officer (retired). He has studied Development Studies at University of Cambridge (UK). He is a distinguished fellow of TERI and is on the governing council of ICSI. He has held the post of the Chief Secretary of West Bengal Government. In his long and distinguished career, Mr. Sen has been the Home Secretary of West Bengal Government. He has also held the post of MD of West Bengal Small Industries Corporation. He has been an independent Director on the Boards of NEEPCO, NTPC - BHEL Power Projects Ltd.