Kharola assumed charge from Rajiv Bansal.
He was the managing director of Bangalore Metro Rail Corporation Ltd since February 2015.
Among others, Kharola has worked in various posts in Karnataka, including as the chairman of Karnataka Urban Infrastructure Development and Finance Corporation Ltd. He has also served as principal secretary to the Karnataka chief minister.
The carrier, which has a debt burden of more than Rs 50,000 crore, managed to eke out operational profit for the first time in a decade in 2015-16.